Phorum Database Error

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Error:

Table './phorum/phorum_users' is marked as crashed and should be repaired (145): SELECT * FROM phorum_users WHERE user_id IN (40253, 40332, 40336, 40358, 40397, 40458, 40048, 40555, 40468, 40639, 40399)

Backtrace:

Function phorum_database_error called at
{path to Phorum}/include/db/mysql/mysqli.php:212
----
Function phorum_db_interact called at
{path to Phorum}/include/db/mysql.php:3217
----
Function phorum_db_user_get called at
{path to Phorum}/include/api/user.php:934
----
Function phorum_api_user_get called at
{path to Phorum}/read.php:492
----