Why to setup the Inventory Posting Profile is Important in the first place

At the start of the project it is important to use the inventory posting profiles correctly.

Once inventory transaction is posted, event there is no GL transaction is created, system will record those accounts to be used in the future.

So even you change the posting profile in later stages all the correction through closing etc will be done according to the original GL account in the posting profiles.

If you want to change the posting profile ,you need to zero your inventory first and continue with the new transactions.