Update flag(UPDKZ) of XVBKD doesn't get updated after value change in user exit.

Hi 

There is an User Exit present that regenerate the aged worth of ZTERM(payment terms) with contiguous worth from Customer maestro grounds erstwhile you unfastened an bid successful VA02. ( successful USEREXIT_MOVE_FIELD_TO_VBKD)

So, When a income bid has aggregate records successful VBKD, the idiosyncratic exit changes each records of XVBKD with caller ZTERM. (that is, header and point line)

But, present is simply a problem. Even aft XVBKD's records are each updated, lone update emblem (UPDKZ) of header, its POSNR is 00000, gets changed. 

And then, UPDKZ of point enactment records, its POSNR is similar 00010, are inactive 'space' truthful that erstwhile you prevention the order, ZTERMs of point lines don't get changed.  

As the effect of tests, I tin input 'U' into UPDKZ of point lines erstwhile ZTERM worth has been changed earlier saving, truthful that ZTERM of point lines tin beryllium updated.

But I'm not definite if it is good oregon not, due to the fact that I deliberation updating UPDKZ should beryllium done by SAP System not by my root code.