phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpbb_1/phpbb_sessions' is marked as crashed and should be repaired

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('b8aa0fd26deb2fb33e9002950765be35', -1, 1454764370, 1454764370, '36a72819', 2, 0)

Line : 158
File : /forum/includes/sessions.php