WFM Schedule Publication API 422 Unprocessable Entity - Constraint Violation

Looking for advice on a recurring issue we are facing during our weekly schedule publication process. We have an automated workflow built in Architect that pushes finalized schedules to Genesys Cloud using the WFM API. This process has been stable for months, but starting last week, we are seeing intermittent 422 Unprocessable Entity errors when attempting to publish schedules for agents who have pending shift swap requests.

The specific error response from the POST /api/v2/wfm/schedules/{scheduleId}/publish endpoint indicates a constraint violation related to overlapping availability windows. Here is the relevant snippet from the response body:

{
 "code": "constraint_violation",
 "message": "Schedule update failed due to conflicting agent availability constraints.",
 "details": "Agent ID 89201 has an active shift swap pending approval that conflicts with the new published shift."
}

We are running Genesys Cloud version 2024.7 and using the Python SDK v2.3.1. Our workflow checks for pending swaps via the GET /api/v2/wfm/schedules/{scheduleId}/swaps endpoint before attempting publication, and the logs confirm that no swaps are flagged as “pending” at the time of the API call. However, the publish action still fails.

The issue seems to correlate with our Chicago timezone peak hours (around 08:00 CST), suggesting a possible race condition or cache inconsistency between the swap approval service and the schedule publication engine. We have tried adding a 30-second delay after swap approvals, but the error persists.

Has anyone encountered similar constraint violations during schedule publication? We need to ensure our agents can view their finalized schedules without manual intervention. Any insights on how to properly sequence these API calls or if there is a known latency issue with the WFM sync in the current release would be greatly appreciated. We are considering moving to a manual approval gate, but that defeats the purpose of our automated scheduling workflow.