Deactivating National Accounts with existing Customers and Transactions

The questions was asked 5 years ago and the answer (thanks Ettienne) is pretty straight forward:
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Clear these fields:
ARCUS.IDNATACCT
AROBL.IDNATACCT
AROBS.IDNATACCT

You can delete records from these tables:
ARNAT
ARNSM

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Any updates/changes to the directions.