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 ('387f689c003a448b1b26b1bbb1f1d022', -1, 1419237457, 1419237457, '36574c64', 29, 0, 0)

Line : 187
File : sessions.php