Function group & was not generated by enhancement wizard

What causes this issue?

Because of security reasons, you can only enter function groups that
were generated by the enhancement wizard. Function group &V1&, however,
was not generated by the enhancement wizard.

System Response

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

How to fix this error?

Either enter a new function group to be generated, or enter a function
group that has already been generated.

Error message extract from SAP system. Copyright SAP SE.