unable to update main account type via excel in AX 2012?

Hello everyone, I am trying to make some changes to Main Accounts and want to change the “Main Account Type” for few of the main accounts that I imported. However, I am getting the error as I try to update for an account record. I try to update few records togather, but still I am getting the following error. Any idea what it could cause this error?

MainAccount.createList Line=4, Pos=4, Xpath=/MainAccount/MainAccount[1] The class AxCommon does not have a parmDEL_ConversionPrinciple method or field DEL_ConversionPrinciple is missing from the query. Update has been canceled

Any thoughts from anyone?