Freeze source and destination subinventory in UI, when supply request is loaded through FBDI

Summary:

We want the users not to edit the source and destination subinventory fields on transfer order in UI, whenever supply request is created through FBDI. How can we freeze these two specific fields?

Or else a validation check should be in place that the source and destination subinventory should be the same for interorganization transfer orders.

Anyone who can assist with this please?

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