The purchase order line populates with the project id from the purchase order header. The activity number can then be added to the purchase order line and is correctly associated to the project_id. If the project id is updated on the purchase order at the line level (not on the project tab) the activity number remains populated based on the previous project_Id number. When this happens there is a data issue because the project_Id and the activity number are no longer associated.

When the project id is updated on the project tab it functions different. When this project id is updated on the project tab, the activity number field blanks out and a activity number can be selected from the drop down that is associated to the updated project id.

We would like the purchase order line to function the same way as in the project tab where the activity number field blanks out if the project_id is changed.