Revaluation Journals are getting created even though no open transactions are avilable in Account Pa

Whenever we are running Revaluation at the end of the each month Revaluation Journals are getting created even though we don't have any open transactions in AP. I know that there is balance in table gl_balance from which Revaluation picks the amount and creates the revaluation journal. I have the account code combination as well but how do I know which amount is getting picked how the journals is getting created. We want to close that balance so that next time Revaluation doesn't create the journals for that amount because we don't have corresponding entries in AP which are open.