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 ('b9d9bdaf404b8034dad61de08a4dafb2', -1, 1506411189, 1506411189, '36c6a54a', -8, 0, 0)

Line : 189
File : sessions.php