i got this error any help?
TrinityCore rev. 0000-00-00 00:00:00 +0000 (Archived) (Win64, Release) (authserver)
<Ctrl-C> to stop.
Using configuration file authserver.conf.
OpenSSL 1.0.2e 3 Dec 2015 (Library: OpenSSL 1.0.2e 3 Dec 2015)
Opening DatabasePool 'auth'. Asynchronous connections: 1, synchronous connections: 1.
MySQL client library: 5.5.9
MySQL server ver: 5.1.50-community
[WARNING] MySQL client/server version mismatch; may conflict with behaviour of prepared statements.
Connected to MySQL database at 127.0.0.1
In mysql_stmt_prepare() id: 12, sql: "UPDATE account SET sessionkey = ?, last_ip = ?, last_login = NOW(), locale = ?, failed_logins = 0, os = ? WHERE username = ?"
Unknown column 'os' in 'field list'
MySQL client library: 5.5.9
MySQL server ver: 5.1.50-community
[WARNING] MySQL client/server version mismatch; may conflict with behaviour of prepared statements.
Connected to MySQL database at 127.0.0.1
In mysql_stmt_prepare() id: 18, sql: "SELECT id, sessionkey, last_ip, locked, v, s, expansion, mutetime, locale, recruiter, os FROM account WHERE username = ?"
Unknown column 'os' in 'field list'
DatabasePool auth NOT opened. There were errors opening the MySQL connections. Check your SQLDriverLogFile for specific errors.
Cannot connect to database
