Fix crash on cycle in EDE change propagation

common/api/core-bentley.api.md

@@ -360,12 +360,14 @@ export enum DbResult {
     BE_SQLITE_ERROR_InvalidChangeSetVersion = 234881034,
     BE_SQLITE_ERROR_InvalidProfileVersion = 117440522,
     BE_SQLITE_ERROR_NoPropertyTable = 50331658,
+    BE_SQLITE_ERROR_NOTOPEN = 16777217,
     BE_SQLITE_ERROR_NoTxnActive = 83886090,
     BE_SQLITE_ERROR_ProfileTooNew = 201326602,
     BE_SQLITE_ERROR_ProfileTooNewForReadWrite = 184549386,
     BE_SQLITE_ERROR_ProfileTooOld = 167772170,
     BE_SQLITE_ERROR_ProfileTooOldForReadWrite = 150994954,
     BE_SQLITE_ERROR_ProfileUpgradeFailed = 134217738,
+    BE_SQLITE_ERROR_PropagateChangesFailed = 33554433,
     BE_SQLITE_ERROR_SchemaImportFailed = 335544330,
     BE_SQLITE_ERROR_SchemaLockFailed = 301989898,
     BE_SQLITE_ERROR_SchemaTooNew = 268435466,

common/changes/@itwin/core-backend/affank-ede-test_2025-10-14-11-57.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@itwin/core-backend",
+      "comment": "Fix crash when their is a cycle in EDE.",
+      "type": "none"
+    }
+  ],
+  "packageName": "@itwin/core-backend"
+}

common/changes/@itwin/core-bentley/affank-ede-test_2025-10-14-11-57.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@itwin/core-bentley",
+      "comment": "Fix crash when their is a cycle in EDE.",
+      "type": "none"
+    }
+  ],
+  "packageName": "@itwin/core-bentley"
+}

core/backend/src/IModelDb.ts

@@ -853,6 +853,9 @@ export abstract class IModelDb extends IModel {
     }
 
     const stat = this[_nativeDb].saveChanges(args ? JSON.stringify(args) : undefined);
+    if (DbResult.BE_SQLITE_ERROR_PropagateChangesFailed === stat)
+      throw new IModelError(stat, `Could not save changes due to propagation failure.`);
+
     if (DbResult.BE_SQLITE_OK !== stat)
       throw new IModelError(stat, `Could not save changes (${args?.description})`);
   }