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 ('cf23b27582c6a6f6fd57601154619044', -1, 1467179891, 1467179891, '36a2390e', -6, 0, 0)

Line : 187
File : sessions.php