Two stock items have the incorrect inventory ID. TT1000BLK and TT1000GRY should be TT1000DBLK and TT1000DGRY respectively. Production orders have already been created using these incorrect IDs.
I know I can create an entirely new item with the correct ID and change the formula. However, is there a better way to do it so the accounts that have a production order already created will not be affected?