The following two points have been completed.
·Download catalina directly from the app store
→Conclusion: Failed as follows
I reinstalled the operating system using the URL below, but failed to avoid "latest state".
Ask the same question in Apple Support Community.
Below is the solution!
Open the terminal, copy and paste
softwareupdate --reset-ignored, and press the return key.
This is not a direct answer, but the link below may be helpful.
Do you live in Japan? Is the network going through a VPN or something?
DNS settings and so on.
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