How to bulk set RITMs inactive (active=false) for particular Assignment Group

[storiesbyjo]

Hi All,
I need to make RITMs inactive (active = false) where the assignment group is "Test Group"`. There are approximately 30,000+ matching records.

Questions:

1. What is the best practice to perform this bulk update safely in Production?
2. Should I use Scripts – Background?
3. Any rollback considerations or audit tips you suggest?