Need confirmation resetting Purchasing DFF configuration and interfacing new PO impact.

Summary:

we had done few Purchasing DFF configuration changes in PROD to accommodate some manual changes on the purchase order.

Now we are planning to reset those DFF based on the config workbook. Below are the DFF we are planning to reset:

1) STOCK TYPE— In Stock type DFF- Display type needs to be changed to Hidden from text box.
2) AUP Burdened-- Read only box needs to be changed from unchecked to checked.
3) AS_Distribution_Unique_Key-- Read only box needs to be changed from unchecked to checked.

Please confirm if we change the above DFF configuration, is there any downstream impact on PO creation/update transactions or any other kind of error while interfacing PO from boundary system.