Table & (Statements could not be generated)

What causes this issue?

A requested database action could not be carried out.

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?

First try to repeat the action which caused this message. If the
database action again cannot be carried out, find out the cause of the
error using the analysis tool in the database utility. There might be
an inconsistency between the table definition in the ABAP Dictionary
and the existing nametab (runtime object for the table).

Error message extract from SAP system. Copyright SAP SE.