My forum is Hacked - i got errors

[محروم.كوم]

helloo

my forum was hacked today.

the hacker enter the admins usernames and delete several threads.

he also deleted the userid=3

any way

now every thread have a post from userid=3 i cannot access it . am gotting this error

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Database error in vBulletin 3.8.2:

Invalid SQL:
SELECT COUNT(threadid) AS total FROM mst_thread WHERE postuserid=;

MySQL Error : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

Error Number : 1064
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i insert the userid=3 in my sql.. but still gaving same problem

help me please __DEFINE_LIKE_SHARE__