Why does the /api/v2/wfm/schedules endpoint returns a 409 Conflict when pushing data from our legacy system? In Zendesk, we simply updated the availability status directly without versioning, but Genesys Cloud requires an If-Match header with the correct eTag. We are getting ‘Precondition Failed’ errors consistently during the bulk import of agent availability for the Paris timezone. Is there a specific retry logic or versioning trick we are missing for this migration step?
The docs actually state that the If-Match header is mandatory for PUT requests to ensure data integrity. You need to fetch the current schedule first using a GET request to retrieve the eTag from the response headers. Then, include that exact eTag value in your subsequent PUT request. If the schedule has changed between your GET and PUT, the 409 conflict prevents accidental overwrites.
For bulk operations, consider implementing a simple retry loop. On a 409 error, re-fetch the resource, apply your changes to the latest version, and retry the update. This handles concurrent edits gracefully.
Note: Ensure your OAuth token has the wfm:schedule:write scope. Without it, you may see 401 or 403 errors instead, which can be confusing during migration scripts. Also, verify timezone handling in your payload matches the agent’s configured timezone to avoid silent data mismatches later.