How to migrate Service Assignment rules criteria with inactive category or Business Unit?

Summary:

I am in the process of migration Classic Help Desk to Next Gen Help Desk. I've completed running job1, 2 ,3 and 4.

Next step is to create assignment rules manually. Some of the rules have a criteria using category value which is no longer valid.

Some rules have a criteria which have Business Unit which are no longer active.

How can configure or migrate these rules?

How can I manage historical data ? Is there a way to archive for reporting purposes?

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25C

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