PPM throws ERROR Value is too large for a dynamic query based lookup attribute

Document ID : KB000100311
Last Modified Date : 06/06/2018
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Question:
Why PPM throws ERROR Value is too large while selecting a value with long ID from a dynamic query based lookup attribute?
Environment:
CA PPM 15.x
Answer:
This error is thrown when the Hidden key of the Dynamic Query based lookup is having a length of more than 30 characters. There was a concern (CLRT-77416) raised for this scenario and our development team confirmed that this is working as per design and not an issue with the product. 

As a workaround, redesign the query to restrict the length of the value being used for the hidden key. Make sure that it does not cross the limit of 30.