Double price variance lines in accounting document

Hi Experts,

In my 101 accounting document, there exist double price variance lines(PRD),one with the actual amount of difference, the other with amount 0,I wonder how could this happen? I've checked in OBYC, nothing special.

By the way, material ledger is activated for the plant, and this issue is not found in all the other plants not activated. Also I found the price in Raw Materials Inventory(BSX) is wrong, don't know where it comes from.

Any thought on this? Your comments are much appreciated.Image may be NSFW.
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