phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('bb7b470a9fbc375d4ad82e9b1c0c4f0d', -1, 1454948936, 1454948936, '36573b72', -1, 0, 0)

Line : 211
File : sessions.php