How to delete a temporary additional assignment record created in error

Summary:

How can a customer delete an additional assignment record/ temporary assignment which was created in error.

While creating the additional assignment, customer flipped the primary flag on the assignment and made the additional assignment as the primary assignment.

Content (please ensure you mask any confidential information):

Now when they try to delete the additional temporary record it throws an error saying you cannot delete the only primary assignment in the work relationship.

When you try to flip the switch between the assignments you still can't delete either of the 2 assignments.

Version (include the version you are using, if applicable):