Data (&1) is still inconsistent after correction (please correct)

What causes this issue?

Inconsistencies still exist after the adjustment of the transaction data
(in this case, &V1&) with the subassignments you specified.

System Response

The transaction data and any changes to FS items and breakdown
categories are not saved.

How to fix this error?

A possible cause for the inconsistencies may be that you entered the
default value as the subassignment, but this value is not permitted for
the selected breakdown type (4).
Check if the cause applies. Then restart the function using valid
subassignments.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.