My SQL Async Error

[ERROR] [MySQL] An error happens on MySQL for query “UPDATE users SET online = 0
, server = 0 WHERE online = 1 AND server = @server {@server=1}”: Unknown column
‘online’ in ‘where clause’

A user pointed this out to me Unknown column 'online' in 'where clause'

But I literally have no idea what that means or how to fix it. And I am pretty sure it’s preventing me from joining my server cause I haven’t been able to join it I have just been stuck on loading.

Please help.