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 ('cdbd5469cf1cdf2117ade7ccdb2d0827', -1, 1513545344, 1513545344, '365acf4b', 1, 0, 0)

Line : 187
File : sessions.php