Phorum Database Error

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Error:

Table './punkforum/phorum5_messages' is marked as crashed and should be repaired (145): SELECT * FROM phorum5_messages WHERE forum_id = 1 AND thread = 498545 AND status =2 ORDER BY message_id LIMIT 0,20

Backtrace:

Function phorum_database_error called at
{path to Phorum}/include/db/mysql/mysqli.php:212
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Function phorum_db_interact called at
{path to Phorum}/include/db/mysql.php:1433
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Function phorum_db_get_messages called at
{path to Phorum}/read.php:363
----