diff --git a/packages/backend-core/src/db/errors.ts b/packages/backend-core/src/db/errors.ts
index db536502b2..17f76c667b 100644
--- a/packages/backend-core/src/db/errors.ts
+++ b/packages/backend-core/src/db/errors.ts
@@ -1,9 +1,14 @@
-export function is409Error(error: any) {
+export function checkErrorCode(error: any, code: number) {
+  const stringCode = code.toString()
   if (typeof error === "object") {
-    return error.status === 409 || error.message?.includes("409")
+    return error.status === code || error.message?.includes(stringCode)
   } else if (typeof error === "number") {
-    return error === 409
+    return error === code
   } else if (typeof error === "string") {
-    return error.includes("409")
+    return error.includes(stringCode)
   }
 }
+
+export function isDocumentConflictError(error: any) {
+  return checkErrorCode(error, 409)
+}
diff --git a/packages/server/src/sdk/app/applications/sync.ts b/packages/server/src/sdk/app/applications/sync.ts
index 559b0733da..d8807251a1 100644
--- a/packages/server/src/sdk/app/applications/sync.ts
+++ b/packages/server/src/sdk/app/applications/sync.ts
@@ -102,7 +102,7 @@ export async function syncUsersToAllApps(userIds: string[]) {
   const failed = resp.filter(promise => promise.status === "rejected")
   const reasons = failed
     .map(fail => (fail as PromiseRejectedResult).reason)
-    .filter(reason => !dbCore.is409Error(reason))
+    .filter(reason => !dbCore.isDocumentConflictError(reason))
   if (reasons.length > 0) {
     logging.logWarn("Failed to sync users to apps", reasons)
   }