help me fix "MyBB SQL Error"

[aiquoc]

MyBB SQL Error
MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1146 - Table 'ho5a67b_db.mybb_users' doesn't exist
Query:
SELECT u.*, f.* FROM mybb_users u LEFT JOIN mybb_userfields f ON (f.ufid=u.uid) WHERE u.uid='1' LIMIT 1
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