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 ('6a24fedd4318f9dbedf82ddd7ab2d6df', -1, 1490905173, 1490905173, '36cd8d04', -4, 0, 0)

Line : 189
File : sessions.php