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 ('81e04c4cb33f15ac9c77b3a1dba0cdf5', -1, 1566426704, 1566426704, '23adeaed', 20, 0, 0)

Line : 187
File : sessions.php