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 ('f83c1cf77e5c4042d55245d6a0cee78e', -1, 1519567055, 1519567055, '36e2fd22', 15, 0, 0)

Line : 211
File : sessions.php