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 ('5ae89866e81e6812d38eeb8a0738cdd5', -1, 1419184793, 1419184793, '3691fc55', 2, 0, 0)

Line : 187
File : sessions.php