Topic: '....' is not an attribute class


I import OnlineMaps v3 in existing project and found errors around 122, and all the errors have similarity of this attribute class, I am attaching some images which shows the error. Could you please help me solve this errors.


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Re: '....' is not an attribute class


Most likely you have a class named Attribute in the global namespace.
This is very bad practice, and you will have compilation errors for all assets that use the System.Attribute class.

How to fix this issue:
1. Use some namespace for your Attribute class.
2. Rename this class.