Phorum Database Error

Sorry, a Phorum database error occurred.
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Error:

Table 'phorum_messages' is marked as crashed and should be repaired (1194): SELECT thread , subject FROM phorum_messages WHERE forum_id = 2 AND parent_id = 0 AND status = 2 AND modifystamp > 1387548137 ORDER BY modifystamp ASC LIMIT 1

Backtrace:

Function phorum_database_error called at
{path to Phorum}/include/db/mysql/mysqli.php:171
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Function phorum_db_interact called at
{path to Phorum}/include/db/mysql.php:1949
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Function phorum_db_get_neighbour_thread called at
{path to Phorum}/read.php:102
----