phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './mediest_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 ('a1a6712e4947ced0a5efb1a1b68f15ec', -1, 1397954823, 1397954823, '36c694bf', 0, 0, 0)

Line : 187
File : sessions.php