FlexField runs one time, changes your data, and then is removed from the E-Business Suite instance. FlexField transforms an existing accounting flexfield’s segment structure, values, code combinations, and CCIDs according to your mappings, and applies the new code combinations and CCIDs. It propagates the change throughout your existing E-Business Suite data, everywhere the accounting flexfield is used. It removes the old code combinations and CCIDs, and aligns the new Chart of Accounts (COA) so that all balances belonging to a single CCID are summarized into a single line.