Prune users

[sonic83]

Hello friends, I want to prune users of my forum but they are more than 10,000 and gives error. From what I read in vbulletin this happens when there are too many. They all have the same registration date so I can not make smaller groups and delete them.

I've thought about deleting them from the database, emptying tables that allude to users, except the admin row.

My question is, apart from the table "USER", are there more tables that I must also empty to avoid incompatibilities?

Thank you