Real life companies merge affetcs active Service Requests

Hello team,

I describe the following scenario we're facing:

customer "Company A"  bought 6 machines (S/N tracked) with related services.

In real life then "Company A" merges to Company B, by transferring ownership of the machines and contractual support rights

we started providing services when "Company A" was alive and now we have one sr for each machine to be updated (with new owner "Company B"), to record the interventions made on the various items.

our goals

owner change on all S/Ns, keep on tracking of task interventions on those machines

the question is:

what alternative we have in addition of closing the existing  SRs and reopen new ones to the customer Company B?