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 ('eef453eb73462f9abb106921ca778e3b', -1, 1425586196, 1425586196, '36d3b6f1', -4, 0, 0)

Line : 172
File : sessions.php