phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './explicit/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 ('d3f4d7264b7af065ea118cb1eb17017d', -1, 1412165520, 1412165520, '32110754', 5, 0, 0)

Line : 187
File : sessions.php