PO Change Document created by TCode ME28

Dears MM Experts ,

When I was checking the PO change history I found that PO line item amount is changed through TCode ME28 (Collective release) , when I tried to change any PO from ME28 and then Double click on the line item and then go to change mode and change something then save , it's showing me that I changed the document through ME23N not from ME28 .

so do you have any idea when I can change the Document from ME28 , and how can I prevent that.