For quality reasons, only & & remain released for procurement

What causes this issue?

Quality Management does not allow unlimited quantities of this material
to be procured from this supplier.
The issue of this purchase order would result in the allowed quantity
being exceeded.

How to fix this error?

Reduce the PO quantity accordingly.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.