This is just a general question about the 3.34 database.

I was looking up a new registration we received from Spain.  Many Spanish people have four names. 

I looked at what I thought was the right section of database, ibf_core_members and the registration wasn't there.  Then I looked at ibf_members and I found the registration.  What is/was the function of ibf_core_members?

Think of this post as historical curiosity and not asking for help because then you would say we don't offer help for 3.3.4.

Please be advised that version 3 is out of support. If you have questions on data/migration, please contact a third party provider who can help you with a migration.

ibf_core_members is used in version 4 and is the member table. It sounds like you did a test upgrade or something to version 4 in the same database. You would need to remove any v4 tables before performing an upgrade/migration from 3 to 4.