Migrate upgraded ADFS farm from WID to SQL

Hi,

We have a few ADFS farms that have been upgraded/migrated from ADFS v3 to ADFS v4 in the past. We now want to migrated the WID database to SQL Always-On. There are numerous articles describing the migration from WID to SQL, but they all only mention AdfsConfiguration.mdf, but in an upgraded farm you also have a AdfsConfigurationV3.mdf (and its respective ldf). Can we ignore the V3 files or do we need to migrate them to?

Please advise!

Kind regards,

Enrico Klein