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 ('5fc58eb7045b47cfdf409c997827d6f7', -1, 1467027928, 1467027928, '36a68dad', -4, 0, 0)

Line : 187
File : sessions.php