Warning in Team planning Page when Risk is assigned to Iteration

Document ID : KB000109086
Last Modified Date : 02/08/2018
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From the Team planning page, the iteration is showing a warning message 'There is 1 work item without an estimate'. 
However,  all the user stories associated to the iteration have a Plan Est value.
User-added image
To Reproduce:

1. Login CAAC
2. Navigate to Plan - > Team planning page.
3. Ensure the iteration associated a Risk item
4. Then the Team Planning page will show the issue message.
5. Try to add a task to risk and also add Est to task. The Team planning page still showing the same issue message.
User-added image
The team fixed the defect, which will not show the warning if there are risks associated with the iteration since they don’t have a plan estimate.