I found weird stuff.
I pinned the topic on the top and I read it then the pin automatically unlocked, the topic not on the top anymore. (logged in as admin)
But the topic still pinned on top if I visit as non registered user and always stay on top no matter how many times I read the topic.
why is it like that?
置顶话题在已被阅读后会自动取消置顶。匿名用户没有阅读追踪功能，因为没人有那么多数据库空间来存储这些数据。因此，置顶话题永远不会被匿名用户标记为“已读”。
If you don’t want that behavior you can go to your
https://meta.discourse.org/my/preferences/interface
and uncheck the “Other - Automatically unpin topics when I reach the bottom.” option
that’s the option I was looking for but it only applies to my account?
how can I apply this setting to all the members?
There’s an automatically unpin topics option in your site settings
can you guide me in which section it exists?
I can’t find
/admin/site_settings/category/all_results?filter=unpin
But that only applies to new members who join, to update existing members you have to use a rake task and update their preferences.