Unable to delete entity due to a business rule restriction

Document ID : KB000104529
Last Modified Date : 04/07/2018
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Question:
User has tried to delete a user of type "Developer" with the role "Org Admin" and the API Portal shows me the error:
Unable to delete entity due to a business rule restriction What can I do? 
Environment:
Portal 4.2
Answer:
As per the current design of the Portal ORG's and ORG Admins can not be deleted. 
Thus is a known design limitation that this version has and our engineering team have it on the road map of next releases to be alerted.