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 ('8d45a61de5dc7bf15d54e1e44ec0c114', -1, 1418912798, 1418912798, '36d3db44', 0, 0, 0)

Line : 187
File : sessions.php