Hi,
Can you see the same information in EBAN table. check whether deletion indicator has been set or not.
Try implementing following notes
Note: 454054, 309795.
Also go through the following links
https://help.sap.com/saphelp_erp60_sp/helpdata/en/8d/3e5c07462a11d189000000e8323d3a/frameset.htm
Network: Problem, if PReq in MM already archived
Regards,
Amit Rajoria