Posts are not associated with their respective users

[محروم.كوم]

I've managed to convert over from IPB 3 to VB 3.8,5, everything is fine except most of the posts are not associated with the user that created them... instead it just say "username *guest*" in every post, even my posts as admin, I've tried editing the post but it still shows as if a guest posted it, but any new posts do not have this issue, any ideas? __DEFINE_LIKE_SHARE__