phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './twisty_phpb1/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 ('33973ccebe6c2e697109e61b8f8852e4', -1, 1513614701, 1513614701, '36a72c20', 8, 0, 0)

Line : 187
File : sessions.php