Commitment Item F0000// does not exist.

Dear Gurus,

While posting a GL transaction, system prompts the error message 'Commitment Item F00000// does not exist'. On the document entry screen,the system populate the right commitment item that was maintained in the GL master data but the posting come up with the error message with an unknown commitment item.

I ran a trace on the FMDERIVE to see where the 'unknown' commitment item is coming from but could not find it, the trace only  derive the Commitment item maintained in the GL masterdata which is the right one.

Please how can I determine where/what is bringing this unknown commitment item?

Thanks for your help.