[Flutter] Your project contains issues that can be fixed by running "dart fix" from the...

I got below warning every time when I start project. How can I fix this warning ?

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What is the reason for this error? How can I fix this?

My current dart versionart 3.1.3 I have problems with darts in all projects after working in this situation for a while.I did some research to solve this problem but couldn't find a solution

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