I think that you have to pre generate the world chunks. Because the Server have issues to save the worlds. You can use Chunky or Fast Chunk Pregenerator.
Also you can use the Management Scripts to set a ram limit for the Server.
i would like it, if you tell us more informations like what server version you use, instead of showing the server log with ipv4 adresses.
But i think that you forgot to delete/change things by changeing the software, also please take a look here:
But you can just create a new one on the papermc.io forums. So, you mean, that the old forum posts are not in the new forum, right?
Or do you mean, that in other wikis there is liked the old post and then you klick it you just come to the forums.papermc.io without the post/article.