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 ('8b171cd8c36ee8a16d748c57b9b9bac1', -1, 1519567008, 1519567008, '36e2fd22', 21, 0, 0)

Line : 211
File : sessions.php