Adjustment of allocation period PoD installation &1 not possible

What causes this issue?

An internal error occurred when adapting the allocation period of the
point of delivery to installation &v1&.

System Response

Processing is terminated.

How to fix this error?

Contact SAP for a solution.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.