API-1004 error: User is unable to Delete a Task in New UX when there is a custom attachment attribute associated to a Task Properties

Document ID : KB000126476
Last Modified Date : 11/02/2019
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Issue:

User is unable to Delete a Task in the Clarity PPM New User Experience (UX) when there is a custom attachment attribute associated to the Task Properties. If you try to delete the task from the project in the New UX, you receive the below error: 

API-1004: Invalid resource identifier 5053009

Cause:
This issue is caused by DE29155/CLRT-81244
Resolution:
This issue is fixed in Clarity PPM 15.2.