Convert my sites Primary Site Collection Administrators to ADFS

We converted our SharePoint 2013 environment to ADFS. I forgot to copy the prod versions of the my sites content DBs to the staging before the conversion. I was able to get the DBs copied over via this post here:

stack post

However, when I access the site collections in Central Admin, they have the NTLM user account as the Primary Site Collection Administrators instead of the ADFS account. When I try to access the my site url, I get "user not found". When I update the Primary Site Collection Administrators to the ADFS account, I can access the my site.

My question is, how to I change the primary site collection admins in central admin to the ADFS account without having to manually do each one? We have thousands. I have already converted the UPA to pull in the ADFS accounts and migrated all the users in the standard site collection to ADFS. I don't know if copying the my site DBs over after the conversion is the issue or if I am missing a step.

Thanks.