Updating AUFK-PRCTR and AUFK-KALSM

Hi Folks

We need to update the columns PRCTR and KALSM in AUFK for ALL our internal orders relating to internal orders from CRM!!! When the AUFK rows was created the PRCTR was not known, and the KALSM is blank!! Does anyone know anye FM to use????

Or is it OK just directly to update the AUFK table???

Best regards