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 ('0497559ec9657f9b36e7e3f2f13d516a', -1, 1571222035, 1571222035, '12d21684', 21, 0, 0)

Line : 187
File : sessions.php