You DON'T want to do it that way.  As the message in GL-P is telling you, changing the date in GL-P will not correct all the related subsidiary tables (Agings, Inventory, etc.) so your files will be out of synch.  You need to go back to the original program where the erroneous date was entered, process a reversing entry for that same erroneous date, then re-enter the transaction for the correct date.