1. Certinia PSA Administration Guide: In the section "Setting Up Resources," the guide details the configuration of resource records. It specifies that the pseResourceRolec field on the Contact object is a picklist that must be maintained. (Reference: Certinia PSA Admin Guide, "Configuring Resources and Roles").
2. Certinia PSA Data Model Documentation: The official object reference for PSA shows that the pseAssignmentc object contains the pseRolec picklist field. The documentation for the Contact object shows the pseResourceRolec picklist field. Administrators are instructed to maintain value consistency between these two fields when customizing roles. (Reference: Certinia PSA Object Reference, pseAssignmentc and Contact object field definitions).