Progress mismatch.

Hello.

I ran into one strange problem.

I transferred my world to a server that I used in a single game to play with a friend. After downloading the world to my computer, I had inventory from the old world, and also appeared in the old place. At the same time, the inventory of chests and other changes in the world after the game with a friend was fine. Is there any way to solve this problem by yourself?

I would not want to wait for the queue before connecting the server when I am ready to play only one.)

(The only option that could be found is to put all your inventory in the chest, and the things left after re-loading in a single game are burning those things.)

In the server settings, I have selected the login mode for licensed accounts.

At the same time, my friend and I played with licensed accounts.

I will try to change the UUID.

I checked the UUID. All files have the same name.

Noticed the difference in the progress of the modification.

Just throwing inventory is not enough.
Moreover, I reinstalled the entire game client entirely. Nothing changed.

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Then there is probably any other type of problem in your playerdata.

I think the easiest way would be to put your items in a chest then

I would do that, but for some reason, the progress in the modifications is different, strange.)

The game should not be third-party conservation outside the root folder. It looks like something really wrong with saving.
In my free time I will try to check it out in a new world.