CHW-4215 RoleInUse

role is in use; reassign members, invitations, and SSO defaults before deleting

Default message: role is in use; reassign members, invitations, and SSO defaults before deleting
HTTP status: 409 (client)

Problem. The role is still referenced by memberships, invitations, or SSO defaults. Cause. Deleting a role while references exist would leave orphan rows. Fix. Reassign members, revoke pending invitations, and update SSO default-role mappings, then retry the delete. HTTP 409.