Why does the system show the msg ‘Quantity Tolerance’ on receipt confirmation?

Cause:
System shows this validation when the receipt (porcp) quantity is greater than the Purchase Order quantity over the tolerance level defined in the item master. System shows validations as ‘Quantity exceeds the PO qty and the tolerance percentage defined in item master’ on receipt confirmation and will not allow you to confirm the record.
Remedies:
The receipt tolerance can be specified as a percentage of item quantity that can be received, over the quantity specified on a Purchase Order, in the PO line quantity.
In item master, Receipt Qty Tol% field defines The item tolerance allowed between an actual receipt and a challan quantity.
Users should check if the Receipt Qty Tol% field is defined.
Then, Users should ensure that the receipt quantity is within the tolerance level of the PO quantity. Users also need to ensure that the item line number is properly added in the receipt.