yes I know nothing much wrong, thats one of the reason why I open this thread.
The content of debug.log is shorten because of limited space.
Actually I leave 2 part in the log;
Uper section when starting version 0.21.0 untill closed from alone while synching, always on same block without error message.
Lower section when starting bitcoin core older version 0.20.1 without problem.

Anyhow I reinstalled 0.21.0 again and start with -reindex and -rescan, now waiting for finish synching....

Thx a lot for your support, I will give feedback later