If we failed to do a material issue and caugjt it weeks after the fact, do we remove the product through an adjustment or can we open the issuance again without causing other issues

You can post the issuance after the fact but your WIP will be out of balance for the weeks between the 2. Also your finished goods costing is most likely messed up now if your not using standard cost If your acting period is not closed yet and finance is okay with it the preferred thing would be to post a backdated issuance on the same date as the completion