Supplier price list error

recently we updated supplier price list , we created PO and try to approve the PO . while approving the PO below issue coming , please help on this.

If you click on the “Detail” button it should give you more information about where the error is originating from. It looks like a custom error to me. Do you have any Method Directives or Data Directives on the PO object?

There’s an In-Transaction Data Directive called “Hnz IT POVal” that’s throwing the error. You’ll need to either examine that directive to figure out what condition it’s using to throw the error, or consult with whomever wrote the BPM.