Unable to add a Payroll Relationship/PPM validation for Contingent workers

Dear Team,

We're encountering an issue when trying to add a validation rule in Redwood UI. Specifically, when a payroll relationship is being added to a contingent worker, the system currently allows it and proceeds with payroll processing. However, our requirement is to prevent this action and trigger an error when someone attempts to assign a payroll relationship to a contingent worker.

We attempted to implement this validation in Redwood UI but were unable to find a way to configure or enforce this condition. Has anyone faced a similar scenario or successfully implemented such a validation? Any guidance or workaround would be greatly appreciated.