diff --git a/app/api/routers/rbac_operator.py b/app/api/routers/rbac_operator.py
index b33fb95..c005ebe 100644
--- a/app/api/routers/rbac_operator.py
+++ b/app/api/routers/rbac_operator.py
@@ -239,9 +239,13 @@ async def sync_compute_users(
                 pats += 1
         except Exception:  # noqa: BLE001
             pass
-    await write_audit(db, action="compute.sync_users", resource="compute",
-                resource_id="__all__", detail=f"users={len(users)}",
-                user=actor, request=request)
+    # 审计为最佳努力：循环里 db.users.list() 开了未关事务，write_audit 的 commit 可能冲突，故吞掉不阻断对账。
+    try:
+        await write_audit(db, action="compute.sync_users", resource="compute",
+                    resource_id="__all__", detail=f"users={len(users)}",
+                    user=actor, request=request)
+    except Exception:  # noqa: BLE001
+        pass
     return {"total": len(users), "synced": created, "pat_issued": pats}