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 ('40725abd4bca1d57a6068d97a3225dbd', -1, 1398300133, 1398300133, '36c4c6d5', -1, 0, 0)

Line : 189
File : sessions.php