I have synthesized the user_proj_example and got this warning, Image is attached below. I have varied the Clock and density but getting the same warning. I am currently using MPW-8c caravel board and open lane, clone through GitHub. Why I am getting this warning?

You can ignore the warning related to fanout.. if something else it's reported as error. If there are errors, you need to resolve it

But in the Log file, it shows a violation.