Row insertion not supported within the append search helps

What causes this issue?

You cannot insert a line within the displayed append search helps.
The append search helps defined for a search help are always displayed
at the end and cannot be edited.

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?

Only insert blank lines before the append search helps.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.