Restore Inactive Relationship Types
You may want to delete custom seed data such as custom relationship types when the relationship type is no longer used in your organization.
If you have accidently deleted these relationship types, as a sales admin, you can restore them. You can temporarily hide certain relationship types and also re-instate them back, if needed later.
When you delete a relationship type, it becomes inactive. You can restore the relationship type later by first searching for the inactive relationship and then restoring it in the Manage Relationship Types task.
Results:
The inactive relationship type is now active.