Problem: The issue here is that the user wanted to display the brother pages of his post relationship. Solution:
The solution to this can be found in our documentation below. https://toolset.com/documentation/user-guides/displaying-brother-pages/
Also when it says $parent you will need to use the slug of the parent CPT so if your Parent CPT is Cars and the slug is cars then in order to get the Parent information you will need to do id='$cars'
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