Predictive routing queue skill assignment fails via CLI in AU-1

Looking for advice on automating predictive routing skill assignments.

The pipeline throws a 422 Unprocessable Entity when linking skills to queues.

Environment: Genesys Cloud CLI v2.1.0, AU-1 BYOC.

Action: Updating queue skills via GitHub Actions.

Manual UI update works fine.

Any known API quirks for bulk skill updates?