Issue with Elimination Assignment

Dears,

we have an issue about an employee: we can't delete the assignment record and his work relationship.

The employee has two assignments: one active and another one inactive with one work relationship.

However , when we go to delete the inactive assignment; It is necessary to move the primary fleg to → yes. So doing this action it creates a new assignment record on active assignment.

How can we eliminate the assignment without creating this loop?

Best Regards,

ADB