Work Order Variance - Reversing Transactions

Hi,

Issue:

We have an issue (WS A 7.3 cume 12) where some Work Orders are showing unusual  Variance. (Example Completed amount is negative while completed quantity on WO and cardex is positive,standard cost positive) etc. Looks like WO were not processed correctly and quantities were changed/reversed midway.

WO are completed and P31802 has run in final mode,how ever P31804 has still not run.

Next Steps:

Please advise if we can reverse these  WO transactions and enter  equivalent new WO and process it (recent WO for these items have processed correctly). Please advise how to reverse the transactions in F3102,Cardex/F0911(IC,IM,IH transactions) and WO files. P31804 has still not run.