diff --git a/lib/ai/runtime/agent-model-circuit-store.ts b/lib/ai/runtime/agent-model-circuit-store.ts
index 2493325c4..118949ff3 100644
--- a/lib/ai/runtime/agent-model-circuit-store.ts
+++ b/lib/ai/runtime/agent-model-circuit-store.ts
@@ -22,7 +22,7 @@ export const agentModelCircuitStore: AgentCircuitStore = {
       const value = { modelId: entry.model.id, reason: fault.reason, status: fault.status, failedAt: failedAt.toISOString(), pausedUntil };
       await tx.insert(systemSettings).values({ key: prefix + entry.model.id, value, updatedAt: failedAt })
         .onConflictDoUpdate({ target: systemSettings.key, set: { value, updatedAt: failedAt },
-          setWhere: sql`${systemSettings.updatedAt} <= ${failedAt}` });
+          setWhere: sql`${systemSettings.updatedAt} <= ${failedAt.toISOString()}::timestamp` });
       await tx.insert(aiModelHealthEvent).values({
         modelId: entry.model.id, providerId: entry.provider.id, modelRuntimeId: entry.model.modelId,
         modelDisplayName: entry.model.displayName, providerType: entry.provider.type, providerName: entry.provider.name,