What it means

A 409 Conflict response indicates the request could not be processed because of a conflict with the current state of the resource. This is common when two users try to update the same record simultaneously, or when creating a resource that already exists.

Common causes

• A resource with the same identifier already exists.
• Two users edited the same record at the same time.
• An optimistic concurrency check failed.

How to fix it

• Refresh the data and try again with the latest version.
• If creating a resource, check whether it already exists first.
• Review the response body for details on what conflicted.