Asset number from PO

Hello

Is anybody knows if when i post a PO with the creation of an asset directly in the PO asset assignment, if it's possible to use a no definitive number ?.

Because sometimes, people from PO services use a wrong material number and create an asset with wrong Material group.

The account service have to create a new asset in AA and modify the PO.

The old number is create for nothing and never be use.

THanks