When We are trying to post the estimates on a specific project we get the below error

"You must select a value in the department field in combination with the following dimensions values that are valid"

This happens so randomly and we nailed it down to the issue that if the project has transactions with blank department dimension value, this error is triggered while posting the estimates. The blank dimension transaction can be one that is from 2017. How can we overcome this error..? Has anyone faced this..?