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 ('2696cc9cfa39b4646f84b0339e4a20e8', -1, 1498739337, 1498739337, '36a6c9d2', 4, 0, 0)

Line : 172
File : sessions.php