desactivate message MM129 in additionnal data

hi

how can i desactivate the information message MM129 in additionnal data in material master.

for exemple i have PC in basic unit in basic data 1 , in additionnal data i put 2 EDU (another unit) => 1 PC and i have this message that the unit is smallest than the basic unit.

in Spro in logistic general =>message system, this message are not and i can't put another entries.

thanks for your answer

serge