Vantage EDI 830

Hi Groups,

I have a problem when import EDI 830 Document. There was a SO# in the
system with L# 13 closed with part number W21715 and L# 24 closed with
part number W43735 but when I import the 930 document It adds the
release lines of part number W21715 in the L# 24 with the part number

I could not figure out why It happened like that. And how to fix it?