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 ('9b600a531915e7dcddf8c6b5fc0c22cb', -1, 1547710016, 1547710016, '36e2194a', -4, 0, 0)

Line : 172
File : sessions.php