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 ('2913aeb79ed35b4f66aae1038a0b92e7', -1, 1464372223, 1464372223, '36a28120', -4, 0, 0)

Line : 172
File : sessions.php