diff --git a/frontend/src/ASNsNewManager.jsx b/frontend/src/ASNsNewManager.jsx
index e8adada..b16fd05 100644
--- a/frontend/src/ASNsNewManager.jsx
+++ b/frontend/src/ASNsNewManager.jsx
@@ -365,9 +365,10 @@ function ASNsNewManager() {
 
   // Локальная фильтрация и пагинация
   const filtered = sortedItems.filter(i => {
+    if (!i) return false;
     const byCommunity = !filterCommunity || i.community === filterCommunity;
     const term = String(searchTerm || '').toLowerCase();
-    const bySearch = !term || String(i.asn).toLowerCase().includes(term);
+    const bySearch = !term || String(i.asn || '').toLowerCase().includes(term);
     return byCommunity && bySearch;
   });
   const totalPages = Math.max(1, Math.ceil(filtered.length / pageSize));
@@ -375,7 +376,7 @@ function ASNsNewManager() {
 
   // Подгружаем имена ASN из кэша/внешних API (после вычисления paginatedItems)
   useEffect(() => {
-    const visible = paginatedItems.map(i => i.asn);
+    const visible = paginatedItems.filter(i => i != null).map(i => i.asn).filter(asn => asn != null);
     visible.forEach(async (asn) => {
       const cached = getAsnNameSync(asn);
       if (cached !== null && typeof cached !== 'undefined') {
@@ -388,7 +389,7 @@ function ASNsNewManager() {
   }, [JSON.stringify(paginatedItems)]);
 
   // Для фильтра - список всех уникальных community
-  const allCommunities = Array.from(new Set(items.map(i => String(i.community))));
+  const allCommunities = Array.from(new Set(items.filter(i => i != null).map(i => String(i.community || '')).filter(c => c !== '')));
 
   // Сортировка по клику
   const handleSort = (field) => {
diff --git a/frontend/src/AutoUrlManager.jsx b/frontend/src/AutoUrlManager.jsx
index 716cb69..717262b 100644
--- a/frontend/src/AutoUrlManager.jsx
+++ b/frontend/src/AutoUrlManager.jsx
@@ -83,7 +83,7 @@ function AutoUrlManager() {
       
       // Validate URLs
       const validUrls = urls
-        .filter(u => isValidHttpUrl(u.url) && isValidCommunity(u.community))
+        .filter(u => u != null && isValidHttpUrl(u.url) && isValidCommunity(u.community))
         .map(u => ({ url: u.url.trim(), community: String(u.community).trim() }));
       if (validUrls.length === 0) {
         setMessage('Добавьте хотя бы одну корректную запись (валидный URL и числовой community)');
@@ -302,7 +302,7 @@ function AutoUrlManager() {
             <div>
               <button
                 className="btn btn-outline-secondary me-2"
-                onClick={() => setUrls(urls.filter(u => u.url || u.community))}
+                onClick={() => setUrls(urls.filter(u => u != null && (u.url || u.community)))}
                 disabled={saving || processing || urls.length === 0}
                 title="Удалить пустые строки"
               >
diff --git a/frontend/src/DomainsNewManager.jsx b/frontend/src/DomainsNewManager.jsx
index 480037f..91465a0 100644
--- a/frontend/src/DomainsNewManager.jsx
+++ b/frontend/src/DomainsNewManager.jsx
@@ -218,7 +218,7 @@ function DomainsNewManager() {
   const [clearCommunitiesOpen, setClearCommunitiesOpen] = useState(false);
 
   const handlePreviewDiff = () => {
-    const valid = items.filter(i => isValidDomain(i.domain) && isValidCommunity(i.community))
+    const valid = items.filter(i => i != null && isValidDomain(i.domain) && isValidCommunity(i.community))
       .map(i => ({ domain: i.domain.trim().toLowerCase(), community: String(i.community).trim() }));
     const unique = deduplicate(valid);
     setDiff(computeDiff(originalItems, unique));
@@ -227,7 +227,7 @@ function DomainsNewManager() {
 
   const handleSaveChanges = async () => {
     // подготовим diff и спросим подтверждение только при массовых изменениях (>10)
-    const valid = items.filter(i => isValidDomain(i.domain) && isValidCommunity(i.community))
+    const valid = items.filter(i => i != null && isValidDomain(i.domain) && isValidCommunity(i.community))
       .map(i => ({ domain: i.domain.trim().toLowerCase(), community: String(i.community).trim() }));
     const unique = deduplicate(valid);
     const diffData = computeDiff(originalItems, unique);
@@ -256,7 +256,7 @@ function DomainsNewManager() {
       // Подгружаем весь список, применяем изменения текущей страницы и сохраняем полные данные
       const fullRes = await api.get(`/domains-new`, { params: { offset: 0, limit: 0, format: 'std' } });
       const full = Array.isArray(fullRes.data?.items) ? fullRes.data.items : (Array.isArray(fullRes.data) ? fullRes.data : []);
-      const fullMap = new Map(full.map(i => [String(i.domain).trim().toLowerCase(), { domain: String(i.domain).trim().toLowerCase(), community: String(i.community || '').trim() }]));
+      const fullMap = new Map(full.filter(i => i != null).map(i => [String(i.domain || '').trim().toLowerCase(), { domain: String(i.domain || '').trim().toLowerCase(), community: String(i.community || '').trim() }]));
       const originalPageMap = new Map(originalItems.map(i => [String(i.domain).trim().toLowerCase(), true]));
       const uniqueMap = new Map(unique.map(i => [String(i.domain).trim().toLowerCase(), { domain: String(i.domain).trim().toLowerCase(), community: String(i.community).trim() }]));
       // Удаления: всё, что было на странице, но отсутствует в изменённом наборе
@@ -300,7 +300,7 @@ function DomainsNewManager() {
     const parsed = lines.map(l => {
       const [d, c] = l.split(/\s+/);
       return { domain: (d || '').toLowerCase(), community: (c || '').trim() };
-    }).filter(i => isValidDomain(i.domain) && isValidCommunity(i.community));
+    }).filter(i => i != null && isValidDomain(i.domain) && isValidCommunity(i.community));
     setItems(prev => {
       const merged = [...prev, ...parsed];
       const map = new Map();
@@ -322,7 +322,7 @@ function DomainsNewManager() {
       const response = await api.get(`/domains-new`, { params: { q: effectiveQ, offset: 0, limit: 0, format: 'std' } });
       const all = Array.isArray(response.data?.items) ? response.data.items : (Array.isArray(response.data) ? response.data : []);
       const header = ['domain', 'community'];
-      const csv = [header, ...all.map(i => [i.domain, i.community])]
+      const csv = [header, ...all.filter(i => i != null).map(i => [i.domain || '', i.community || ''])]
         .map(r => r.map(x => `"${(x ?? '').toString().replace(/"/g, '""')}"`).join(','))
         .join('\n');
       const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
@@ -338,7 +338,7 @@ function DomainsNewManager() {
   };
 
   const clearInvalid = () => {
-    setItems(prev => prev.filter(i => i.domain || i.community)
+    setItems(prev => prev.filter(i => i != null && (i.domain || i.community))
       .filter(i => isValidDomain(i.domain) && isValidCommunity(i.community))
     );
   };
@@ -376,16 +376,17 @@ function DomainsNewManager() {
 
   // Локальная фильтрация и пагинация
   const filtered = sortedItems.filter(i => {
+    if (!i) return false;
     const byCommunity = !filterCommunity || i.community === filterCommunity;
     const term = String(searchTerm || '').toLowerCase();
-    const bySearch = !term || String(i.domain).toLowerCase().includes(term);
+    const bySearch = !term || String(i.domain || '').toLowerCase().includes(term);
     return byCommunity && bySearch;
   });
   const totalPages = Math.max(1, Math.ceil(filtered.length / pageSize));
   const paginatedItems = filtered.slice((currentPage - 1) * pageSize, (currentPage) * pageSize);
 
   // Для фильтра - список всех уникальных community
-  const allCommunities = Array.from(new Set(items.map(i => i.community)));
+  const allCommunities = Array.from(new Set(items.filter(i => i != null).map(i => i.community).filter(c => c != null)));
 
   // Сортировка по клику
   const handleSort = (field) => {
@@ -450,8 +451,8 @@ function DomainsNewManager() {
 
   const handleBulkExport = () => {
     if (selectedDomains.size === 0) return;
-    const selectedItems = items.filter(i => selectedDomains.has(i.domain));
-    const text = selectedItems.map(i => `${i.domain} ${i.community}`).join('\n');
+    const selectedItems = items.filter(i => i != null && selectedDomains.has(i.domain));
+    const text = selectedItems.map(i => `${i.domain || ''} ${i.community || ''}`).join('\n');
     const blob = new Blob([text], { type: 'text/plain' });
     const url = URL.createObjectURL(blob);
     const a = document.createElement('a');
@@ -895,7 +896,7 @@ function DomainsNewManager() {
         show={clearCommunitiesOpen}
         onClose={() => setClearCommunitiesOpen(false)}
         onConfirm={() => { 
-          setItems(prev => prev.filter(i => i.community !== filterCommunity)); 
+          setItems(prev => prev.filter(i => i != null && i.community !== filterCommunity)); 
           setClearCommunitiesOpen(false); 
         }}
         title="Удалить записи community?"
diff --git a/frontend/src/FilterManager.jsx b/frontend/src/FilterManager.jsx
index 0e7b4b8..38a1f6b 100644
--- a/frontend/src/FilterManager.jsx
+++ b/frontend/src/FilterManager.jsx
@@ -97,7 +97,10 @@ function FilterManager() {
     })();
   }, []);
 
-  const filterKey = (f) => `${String(f.community || '')}||${String(f.gateway || '')}`;
+  const filterKey = (f) => {
+    if (!f) return '';
+    return `${String(f.community || '')}||${String(f.gateway || '')}`;
+  };
 
   useEffect(() => {
     fetchServers();
@@ -460,8 +463,13 @@ function FilterManager() {
     }
   };
 
-  const handleDeleteFilter = async (filter) => {
-    const updatedFilters = serverFilters.filter(f => f.community !== filter.community);
+  const handleDeleteFilter = async () => {
+    if (!filterToDelete || !selectedServer) return;
+    
+    const updatedFilters = serverFilters.filter(f => {
+      if (!f || !filterToDelete) return true;
+      return f.community !== filterToDelete.community || f.gateway !== filterToDelete.gateway;
+    });
     setServerFilters(updatedFilters);
     setDeleteFilterModalOpen(false);
     setFilterToDelete(null);
@@ -617,13 +625,15 @@ function FilterManager() {
     const search = filterSearch.trim().toLowerCase();
     const filtered = search
       ? serverFilters.filter((f) => {
+          if (!f) return false;
           const c = String(f.community || '').toLowerCase();
           const g = String(f.gateway || '').toLowerCase();
           const d = String(f.description || '').toLowerCase();
           return c.includes(search) || g.includes(search) || d.includes(search);
         })
-      : serverFilters.slice();
+      : serverFilters.filter(f => f != null).slice();
     const sorted = filtered.sort((a, b) => {
+      if (!a || !b) return 0;
       const av = String(a[sortBy] || '').toLowerCase();
       const bv = String(b[sortBy] || '').toLowerCase();
       if (av < bv) return sortDir === 'asc' ? -1 : 1;
@@ -645,6 +655,7 @@ function FilterManager() {
   // Убрано сохранение режима в localStorage по просьбе пользователя
 
   const startInlineEdit = (filter) => {
+    if (!filter) return;
     setEditingKey(filterKey(filter));
     setEditingDraft({
       community: filter.community || '',
@@ -1240,12 +1251,12 @@ function FilterManager() {
                         </tr>
                       </thead>
                       <tbody>
-                        {processedFilters.map((filter, index) => {
+                        {processedFilters.filter(f => f != null).map((filter, index) => {
                           const key = filterKey(filter);
                           const isEditing = editingKey === key;
                           const isSelected = selectedFilterKeys.has(key);
                           return (
-                          <tr key={`${filter.community}-${index}`} className={isEditing ? 'table-info' : ''}>
+                          <tr key={`${filter?.community || ''}-${index}`} className={isEditing ? 'table-info' : ''}>
                             <td>
                               <input
                                 className="form-check-input m-0 align-middle"
@@ -1268,7 +1279,7 @@ function FilterManager() {
                                   <span className="badge bg-blue-lt text-blue me-2">
                                     <IconHash size={12} />
                                   </span>
-                                  <code className="text-blue">{filter.community}</code>
+                                  <code className="text-blue">{filter?.community || ''}</code>
                                 </div>
                               )}
                             </td>
@@ -1284,7 +1295,7 @@ function FilterManager() {
                                   <span className="badge bg-green-lt text-green me-2">
                                     <IconServer size={12} />
                                   </span>
-                                  <code className="text-green">{filter.gateway}</code>
+                                  <code className="text-green">{filter?.gateway || ''}</code>
                                 </div>
                               )}
                             </td>
@@ -1296,8 +1307,8 @@ function FilterManager() {
                                   onChange={(e) => setEditingDraft({ ...editingDraft, description: e.target.value })}
                                 />
                               ) : (
-                                <div className="text-truncate" style={{ maxWidth: '300px' }} title={filter.description || ''}>
-                                  {filter.description ? (
+                                <div className="text-truncate" style={{ maxWidth: '300px' }} title={filter?.description || ''}>
+                                  {filter?.description ? (
                                     <span className="text-muted">{filter.description}</span>
                                   ) : (
                                     <span className="text-muted fst-italic">Без описания</span>
@@ -1712,26 +1723,26 @@ function FilterManager() {
                   ) : simpleFilters.length === 0 ? (
                     <tr><td colSpan={4} className="text-center text-muted">Нет фильтров</td></tr>
                   ) : (
-                    simpleFilters.map((filter, idx) => (
+                    simpleFilters.filter(f => f != null).map((filter, idx) => (
                       <tr key={idx}>
                         <td>
                           <input
                             className="form-control form-control-sm"
-                            value={filter.community}
+                            value={filter?.community || ''}
                             onChange={e => handleSimpleEditFilter(idx, 'community', e.target.value)}
                           />
                         </td>
                         <td>
                           <input
                             className="form-control form-control-sm"
-                            value={filter.gateway}
+                            value={filter?.gateway || ''}
                             onChange={e => handleSimpleEditFilter(idx, 'gateway', e.target.value)}
                           />
                         </td>
                         <td>
                           <input
                             className="form-control form-control-sm"
-                            value={filter.description || ''}
+                            value={filter?.description || ''}
                             onChange={e => handleSimpleEditFilter(idx, 'description', e.target.value)}
                           />
                         </td>
@@ -2041,7 +2052,7 @@ function EditFilterModal({ show, filter, onChange, onSave, onClose }) {
                   type="text"
                   className="form-control"
                   placeholder="65001:200"
-                  value={filter.community}
+                  value={filter?.community || ''}
                   onChange={(e) => handleChange('community', e.target.value)}
                   required
                 />
@@ -2052,7 +2063,7 @@ function EditFilterModal({ show, filter, onChange, onSave, onClose }) {
                   type="text"
                   className="form-control"
                   placeholder="SWE-HIPHOST"
-                  value={filter.gateway}
+                  value={filter?.gateway || ''}
                   onChange={(e) => handleChange('gateway', e.target.value)}
                   required
                 />
@@ -2063,7 +2074,7 @@ function EditFilterModal({ show, filter, onChange, onSave, onClose }) {
                   type="text"
                   className="form-control"
                   placeholder="Описание фильтра"
-                  value={filter.description}
+                  value={filter?.description || ''}
                   onChange={(e) => handleChange('description', e.target.value)}
                 />
               </div>
@@ -2099,9 +2110,9 @@ function DeleteFilterModal({ show, filter, onDelete, onClose }) {
           <div className="modal-body">
             <p>Вы уверены, что хотите удалить фильтр?</p>
             <div className="alert alert-warning">
-              <strong>Community:</strong> {filter.community}<br />
-              <strong>Gateway:</strong> {filter.gateway}<br />
-              {filter.description && <><strong>Описание:</strong> {filter.description}</>}
+              <strong>Community:</strong> {filter?.community || ''}<br />
+              <strong>Gateway:</strong> {filter?.gateway || ''}<br />
+              {filter?.description && <><strong>Описание:</strong> {filter.description}</>}
             </div>
           </div>
           <div className="modal-footer">
diff --git a/frontend/src/IPRangesManager.jsx b/frontend/src/IPRangesManager.jsx
index 14f7026..53800a3 100644
--- a/frontend/src/IPRangesManager.jsx
+++ b/frontend/src/IPRangesManager.jsx
@@ -225,7 +225,7 @@ function IPRangesManager() {
   const [analyzeFilters, setAnalyzeFilters] = useState({ community: '', minMask: 0, maxMask: 32, type: 'any', supernet16: false });
 
   const handlePreviewDiff = () => {
-    const valid = items.filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community))
+    const valid = items.filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community))
       .map(i => ({ ipRange: i.ipRange.trim(), community: String(i.community).trim() }));
     const unique = deduplicate(valid);
     setDiff(computeDiff(originalItems, unique));
@@ -234,7 +234,7 @@ function IPRangesManager() {
 
   const handleSaveChanges = async () => {
     // подготовим diff и спросим подтверждение только при массовых изменениях (>10)
-    const valid = items.filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community))
+    const valid = items.filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community))
       .map(i => ({ ipRange: i.ipRange.trim(), community: String(i.community).trim() }));
     const unique = deduplicate(valid);
     const diffData = computeDiff(originalItems, unique);
@@ -329,7 +329,7 @@ function IPRangesManager() {
     const parsed = lines.map(l => {
       const [cidr, c] = l.split(/\s+/);
       return { ipRange: (cidr || '').trim(), community: (c || '').trim() };
-    }).filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community));
+    }).filter(i => i != null && isValidCidr(i.ipRange) && isValidCommunity(i.community));
     setItems(prev => {
       const merged = [...prev, ...parsed];
       const map = new Map();
@@ -342,7 +342,7 @@ function IPRangesManager() {
   };
 
   const clearInvalid = () => {
-    setItems(prev => prev.filter(i => i.ipRange || i.community)
+    setItems(prev => prev.filter(i => i != null && (i.ipRange || i.community))
       .filter(i => isValidCidr(i.ipRange) && isValidCommunity(i.community))
     );
   };
@@ -603,7 +603,7 @@ function IPRangesManager() {
     const community = String(analyzeFilters.community || '').trim();
     if (!community) { window.notify?.error?.('Выберите community'); return; }
     // исходные для community
-    const allForCommunity = items.filter(i => i.community === community && isValidCidr(i.ipRange));
+    const allForCommunity = items.filter(i => i != null && i.community === community && isValidCidr(i.ipRange));
     const totalBefore = allForCommunity.length;
 
     const filtered = allForCommunity.filter(i => {
@@ -641,7 +641,7 @@ function IPRangesManager() {
   const applyAnalysisToItems = () => {
     if (!analysisPreview) return;
     const { community, afterCidrs, unchangedCidrs } = analysisPreview;
-    const keptOthers = items.filter(i => i.community !== community);
+    const keptOthers = items.filter(i => i != null && i.community !== community);
     const newCommunityItems = [
       ...unchangedCidrs.map(ipRange => ({ ipRange, community })),
       ...afterCidrs.map(ipRange => ({ ipRange, community }))
@@ -1054,7 +1054,7 @@ function IPRangesManager() {
         message={`Будут удалены все IP-диапазоны с community "${filterCommunity}". Действие НЕ сохраняет изменения автоматически.`}
         confirmText={'Удалить'}
         cancelText={'Отмена'}
-        onConfirm={() => { setItems(prev => prev.filter(i => i.community !== filterCommunity)); setClearCommunitiesOpen(false); }}
+        onConfirm={() => { setItems(prev => prev.filter(i => i != null && i.community !== filterCommunity)); setClearCommunitiesOpen(false); }}
         onCancel={() => setClearCommunitiesOpen(false)}
       />
       {/* Analyze Settings Modal */}
diff --git a/frontend/src/hooks/useDataManager.js b/frontend/src/hooks/useDataManager.js
index b15a627..a69867c 100644
--- a/frontend/src/hooks/useDataManager.js
+++ b/frontend/src/hooks/useDataManager.js
@@ -129,7 +129,7 @@ export function useDataManager(config) {
         continue;
       }
       const prev = mapBefore.get(k);
-      if (String(prev.community) !== String(v.community)) {
+      if (prev && v && String(prev.community || '') !== String(v.community || '')) {
         changed.push({ from: prev, to: v });
       }
     }
@@ -147,6 +147,7 @@ export function useDataManager(config) {
     try {
       // Валидируем и дедуплицируем
       const valid = items.filter(item => {
+        if (!item) return false;
         const itemValid = validateItem ? validateItem(item[itemKey]) : true;
         const communityValid = validateCommunity ? validateCommunity(item.community) : true;
         return itemValid && communityValid;
@@ -198,7 +199,8 @@ export function useDataManager(config) {
   };
 
   // Сортировка
-  const sortedItems = [...items].sort((a, b) => {
+  const sortedItems = [...items].filter(item => item != null).sort((a, b) => {
+    if (!a || !b) return 0;
     let valA = a[sortField] || '';
     let valB = b[sortField] || '';
     if (typeof valA === 'string') valA = valA.toLowerCase();
@@ -210,9 +212,10 @@ export function useDataManager(config) {
 
   // Фильтрация
   const filtered = sortedItems.filter(item => {
+    if (!item) return false;
     const byCommunity = !filterCommunity || item.community === filterCommunity;
     const term = String(searchTerm || '').toLowerCase();
-    const bySearch = !term || String(item[itemKey]).toLowerCase().includes(term);
+    const bySearch = !term || String(item[itemKey] || '').toLowerCase().includes(term);
     return byCommunity && bySearch;
   });
 
@@ -221,7 +224,7 @@ export function useDataManager(config) {
   const paginatedItems = filtered.slice((currentPage - 1) * pageSize, currentPage * pageSize);
 
   // Уникальные community для фильтра
-  const allCommunities = Array.from(new Set(items.map(i => i.community)));
+  const allCommunities = Array.from(new Set(items.filter(i => i != null).map(i => i.community).filter(c => c != null)));
 
   // Управление сортировкой
   const handleSort = (field) => {