SAP Message UX387 - Condition header data of record & in the sequence not correct

Diagnosis
The condition data contains a plausibility error.

System Response
The system refuses to transfer the data.

Procedure
Check the content of the following fields for the record specified:
BZUSAGE
The commitment capital must be greater than zero.
DGUEL_KK
No "Start of term" or "Fixed to" values have been entered.
DEFSZ
The "Effective to" date is greater than DGUEL_KK.
DELFZ
The "End of term" is before the "Effective to" date (DEFSZ).
The "End of term" is before the "Start of term" (DEFSZ).