ODQMON - Field ODQ_UNITNO

Hi,

we extract data using 0FI_GL_4 and during delta load we face an interesting situation.

a document is twice in ODQMON, same ODQ_TSN number but different ODQ_UNITNO ( 1 and 2 ). As there is no difference in any field of the document, why is there a second ODQ_UNITNO?

Has anyone information what this field is used for?

BR

Gunter