Can you share more about the steps you took that got you to this error?
You said "successful migration" .. please go into more detail about what you migrated and how you setup WordPress on the new server.
In my experience, table prefix shouldn't have anything to do with that particular error. More likely that the site was already created, which you can find by running "wo site list" to see if the domain is already present.
In my personal experience, I've been using UpdraftPlus to migrate sites between servers, and it has worked quite effectively to get the job done.