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 ('4b9e2754f24876adf30ac8b757b8deba', -1, 1513602561, 1513602561, '36f2cd21', 4, 0, 0)

Line : 187
File : sessions.php