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 ('83545398e7f70a5e8f301f8ccae0fe12', -1, 1513539586, 1513539586, '36a3d2aa', 5, 0, 0)

Line : 187
File : sessions.php