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 ('0aa9d0218f8521b9b7ce0a4167c626d4', -1, 1513567944, 1513567944, '36a33d42', 1, 0, 0)

Line : 187
File : sessions.php