Simple SQL Update with Join and Where Exists

UPDATE Part_Master
SET RECVEN_01 = VENID_10
from Part_Master as P INNER join Order_Master as O ON P.PRTNUM_01 = O.PRTNUM_10
WHERE EXISTS
(SELECT PRTNUM_10, VENID_10
FROM Part_Master as P join Order_Master as O ON P.PRTNUM_01 = O.PRTNUM_10
WHERE TYPE_01 = ‘B’ OR TYPE_01 = ‘O’
GROUP BY PRTNUM_10, VENID_10)