What is this problem when installing Cinnamon?

Hello friends,
I am trying to install the Cinnamon desktop environment on Zorin OS 17.2 Pro.
I am encountering this problem.
What is the reason for it?

Did you add any other Repository before trying to install Cinnamon D.E.?
(No other repository is needed. I also do not recommend adding a Cinnamon Repository, as doing so will create package conflicts).

In Software & Updates, Is your Download from set to "Main Server"? If not, please set it to Main Server.

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Could You post the Output of sudo apt update to check what Sources are active? Also type apt list cinnamon-core for the available Version please.

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Yes, I had this repository:
ppa:kelebek333/mint-tools
I removed it.
I have a question:
What is the difference between Cinnamon and Cinnamon core? I installed Cinnamon core.

Cinnamon-Core is the basic minimal Cinnamon Desktop Environment. No frills.

Cinnamon is the full Cinnamon Desktop with the frills and goodies.

It does not particularly matter which you install, since if you need/want something more, you will go and install it anyway. Installing Cinnamon-Core allows a bit less bloat.

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Installed version 5.2.7
Can it be updated to a higher version

No, that above version is the correct version for glibc, etc.

However, you are better off for it in most cases. The later versions of Cinnamon suffered several removals rather than additions of features.

And what features were added, were added to Nemo File Manager which you can install a higher version of.
To install a later Nemo, you would need to add the Mint Staging Repository, then reinstall Nemo.
Once done, Remove the Mint-Staging repository.

You might be tempted to keep the staging repository and then try upgrading your system to get a later version of Cinnamon. Don't.
Glibc.
It will break everything.

So, remove the staging repository once Nemo is upgraded.

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Thanks

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