Structure maintenance not provided for extraction structure &1 ->

What causes this issue?

Structure &V1& concerns a technical extraction structure. The inclusion
of additional fields by using the structure maintenance is not part of
the procedure for this.
If an extraction structure is used for extracting transaction data from
two different business events, then the generic filling of the
extraction structure fields from the fundamental communication
structure data does not normally occur. An enhancement of structure
&V1& could then cause the newly included fields from the different
events to be filled differently or not at all.

How to fix this error?

Use the fields delivered by SAP for the structure &V1&. Check to see
whether the additional information you want can be extracted using
other structures.

Error message extract from SAP system. Copyright SAP SE.