We are unable to update the ‘Allow price Override on Order’ as Y for contracts

Summary:We need to update the ‘Allow price Override on Order’ as Y for contracts, but we are unable to change the value even after successful import

Contract management -> Contract

Provide contract number: for example WED-213901-1291571

Navigate to Lines -> then scroll right and see the column ‘Allow price Override on Order’

We need to update the blank values to Y.

We are trying to do it via import

Import Object as ‘Contract Pricing Terms’

We are providing both the required fields- Line PUID and PricingTermsPuid, along with

AllowCustomAdjustmentsFlag as Y

The import is getting successful but, in UI it is not changing.