A couple of days ago i've made a tool to duplicate assistants, and to dynamically assign assistants to a phone number. This works fine, but after a couple of hours the line gets the assistant removed and no further calls can be received. Any idea what might be causing this ? 019a3097-61b3-7ee6-acc3-8aa6d9597d59 2025-10-29 15:30:18 GMT+0 2025-10-29 15:40:30 GMT+0 It was expected that the call woul be answered, and instead an error message was heard on the phone. Thanks Ignacio

Suggestion: Double-check that your tool or workflow is not unintentionally clearing the assistant assignment after a few hours. To ensure the assistant remains assigned, you can periodically re-assign the assistant ID to your phone number using the Vapi API or Dashboard.

javascript
// Example: Assign assistant to phone number
await vapi.phoneNumbers.update({
  id: "your-phone-number-id",
  assistantId: "your-assistant-id"
});

This helps prevent the "Assistant not valid" error and ensures calls are handled as expected ([Discord discussion](https://discord.com/channels/1211482211119796234/1336652401733668864)). Source: - [Discord discussion about Assistant not valid error](https://discord.com/channels/1211482211119796234/1336652401733668864)