diff --git a/apps/api/src/services/service-config-service.ts b/apps/api/src/services/service-config-service.ts
index bdf1354..5646ab1 100644
--- a/apps/api/src/services/service-config-service.ts
+++ b/apps/api/src/services/service-config-service.ts
@@ -29,6 +29,7 @@ import * as domainService from "./domain-service.js";
 import { syncServiceToVpsTracker } from "./vps-tracker-sync.js";
 import { fireEnsureHealthWorker, DEFAULT_HEALTH_FALLBACKS } from "./health/health-worker-deploy.js";
 import {
+  isHealthy,
   selectActiveIpsByMode,
   withBindingLock,
   type LbIpRow,
diff --git a/apps/api/test/service-bindings-prune.test.ts b/apps/api/test/service-bindings-prune.test.ts
index 1772e43..b5e24b1 100644
--- a/apps/api/test/service-bindings-prune.test.ts
+++ b/apps/api/test/service-bindings-prune.test.ts
@@ -78,4 +78,53 @@ describe("service bindings prune", () => {
     expect(bindings).toHaveLength(2);
     expect(bindings.map((b) => b.hostname).sort()).toEqual(["api", "www"]);
   });
+
+  it("updateConfig with extra FQDN per IP does not throw when group health-check is on", async () => {
+    const db = setupDb();
+    const cf = mockCf();
+    const health = {
+      health_check_enabled: true,
+      health_check_type: "tcp" as const,
+      health_check_port: 443,
+      health_check_providers: ["local", "cloudflare", "globalping"] as const,
+      health_check_aggregate: "majority" as const,
+    };
+
+    repos.createDomain(db, null, "example.com", "cf-zone-example");
+    const group = repos.createServiceGroup(
+      db,
+      "VPN",
+      "vpn",
+      null,
+      "vpn.example.com",
+      { ...health },
+    );
+    const service = repos.createService(db, "GT", "gt");
+    repos.setServiceGroup(db, service.id, group.id);
+    repos.setServiceEnabled(db, service.id, true);
+
+    const view = await updateConfig(db, cf, service.id, {
+      ips: ["93.115.203.183", "130.49.213.153"],
+      domains: [
+        {
+          fqdn: "gt.example.com",
+          target_ips: ["93.115.203.183", "130.49.213.153"],
+          ...health,
+        },
+        {
+          fqdn: "rutg.example.com",
+          target_ips: ["93.115.203.183"],
+          ...health,
+        },
+        {
+          fqdn: "nsgt.example.com",
+          target_ips: ["130.49.213.153"],
+          ...health,
+        },
+      ],
+    });
+
+    expect(view.domains).toHaveLength(3);
+    expect(view.ips.sort()).toEqual(["130.49.213.153", "93.115.203.183"]);
+  });
 });