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 ('f500a02afd2ce88df26b714a13380430', -1, 1427564596, 1427564596, '3691f6b7', -1, 0, 0)

Line : 187
File : sessions.php