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 ('717bd3a4e36b266e1f0dc8f0ef3d7086', -1, 1398330004, 1398330004, '171414c3', -1, 0, 0)

Line : 189
File : sessions.php