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 ('351a0c633f7a92b5cd43809e6c1bf3bd', -1, 1513573297, 1513573297, '365a5ccc', 2, 0, 0)

Line : 187
File : sessions.php