1..4 dictionary texts; V variable dictionary texts; F fixed modifications

What causes this issue?

The specified value is not defined for key words (field texts).

How to fix this error?

Use any of the following:

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

1 Fixed short key word
2 Fixed medium key word
3 Fixed long key word
4 Fixed header
X Text field modified against ABAP Dictionary
_ (SPACE) Variable key word, i.e. the most appropriate in length
(1..3) is taken from the ABAP Dictionary

Error message extract from SAP system. Copyright SAP SE.