Questions about address fields in SAP

Hello All,

We have certain regions in SAP that are setup incorrectly. E.g. Region Texas was setup as TXU rather than TX. I want to correct this to TX, but If I delete TXU from the configuration table, it will affect all the cost centers, WBES etc that had TXU in it's master data. I did a where used on field regio and found 551 tables having this field. Only the master data table should matter to me as the transaction data won't be affected if I change this field.

How do I go about finding out all the master data objects that I will need to update, once I change this region field?

Thanks so much for looking into this.