An employee created the recurring invoices and got terminated after few months.

Summary:

Employee has created the recurring invoice and it will go for approval every month.However the employee got terminated after 4 months.Now when the invoices gets created and it will not go for approval as the employee itself gor terminated and the system not able to identify the supervisor.
Example:
Employee X created the recurring invoice - Starting from JAN-2026 to DEC-2026
However in the month of APRIL the employee got terminated
In May month the invoice got created but as the employee is not there, so it did not go to any supervisor and the approval error out.How to overcome this issue?