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 ('20f1e4ede252ef326a9cc9fb0bc5d111', -1, 1490625706, 1490625706, '36d3a94c', -4, 0, 0)

Line : 187
File : sessions.php