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 ('b8590d526e4e9b6f030a3da526b7e5f4', -1, 1513567304, 1513567304, '36a33d42', 8, 0, 0)

Line : 187
File : sessions.php