phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/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, session_admin) VALUES ('0f5b6a98962e5bd7539dc9254e0a2cce', -1, 1419190428, 1419190428, '3691b7be', -4, 0, 0)

Line : 187
File : sessions.php