Field & does not exist in GLU1

What causes this issue?

A field that is used as a receiver field in FI-SL must be defined in
the internal structure GLU1 in the ABAP/4 Dictionary.

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?

Include field &V1& in the definition of the internal structure GLU1.

Error message extract from SAP system. Copyright SAP SE.