UPDATE FORNECEDOR
SET QTMINAUTFOT = NULL
WHERE QTMINAUTFOT < 0
/
COMMIT
/
UPDATE FORNECEDOR
SET VRMINAUTFOR = NULL
WHERE VRMINAUTFOR < 0
/
COMMIT
/                 
UPDATE MINFORNREG
SET QTMINFORNREG = NULL
WHERE QTMINFORNREG < 0
/
COMMIT
/
UPDATE MINFORNREG
SET VRMINFORNREG = NULL
WHERE VRMINFORNREG < 0
/
COMMIT
/

