Phorum Database Error

Sorry, a Phorum database error occurred.
Please try again later!

Error:

Table './phorum/phorum_users' is marked as crashed and should be repaired (145): SELECT * FROM phorum_users WHERE user_id IN (40946, 40419, 40349, 40704, 40354, 40116, 40071, 39265, 39353, 39183, 15060, 35722, 24367, 18053, 9484, 9273)

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}/include/api/user.php:1122
----
Function phorum_api_user_get_display_name called at
{path to Phorum}/include/feed_functions.php:22
----
Function phorum_feed_make_rss called at
{path to Phorum}/feed.php:137
----