Confused. CA1063 is wrong? GC.SuppressFinalize(this)

I have a simple class MyDataClass with a member (obj) that implements IDisposable:

public class MyDataClass : IDisposable
{
    private DisposableObject obj;
    private List<string> list;
    private int c;

    public MyDataClass()
    {
        obj = new DisposableObject();
        list = new List<string>();
        c = 114;
    }

    public void Dispose()
    {
        obj.Dispose();
    }
}

public class DisposableObject : IDisposable
{
    public void Dispose()
    {
        // Free resource
        Console.WriteLine("Dispose DisposableObject");
    }
}

When I run the Code Analysis I get the CA1063 warning which shows me that I should call GC.SuppressFinalize() method in the Dispose() method in MyDataClass implementation.

And I am really confused about this CA1063 warning. Because as far as I know, I should call GC.SuppressFinalize() to indicate to the garbage collector:

"Hey GC, do not worry about this object because I have done already all cleaning work for you!"

So please confirm if I am wrong or not. If I will add the GC.SuppressFinalize() I will get rid of the CA1063 but it will cause that GC will not clean my object. So I will have a memory leak because other class members (managed code) will be not cleaned.