“Property Not Allowed” in angular.json error in Visual Studio CODE for Angular CLI version 9.1.1

Question

I created a new project using Angular CLI 9.1.1 and VSCode is giving me the following warning in angular.json file:

Property AM is not allowed
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Answer 1

The error was gone when change project name and all other occurrences for it in "angular.json" to lowercase letters. no need to create another project or any other stuff.