Internal error in function module &1 &2 &3 &4

What causes this issue?

An internal error has occurred which can only have been caused by data
inconsistencies.

System Response

Processing was terminated.

How to fix this error?

Notify your system administrator.

Procedure for System Administrators

Contact the hotline and inform them of the function perfomed and the
following parameters:
Function module &V1&
&V2&
&V3&
&V4&

Error message extract from SAP system. Copyright SAP SE.