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 ('18f1814ca3c1c7d53b7ab9b5c964536a', -1, 1513573215, 1513573215, '365a5ccc', 8, 0, 0)

Line : 187
File : sessions.php