Today I saw that few things are changed without any notification or how-to article hence mentioning here.
1) During import field mapping screen we see that 2 "Team" fields are visible even though studio shows only 1. Workaround I found is to create "Team 1" and "Team 2" in excel with same values. Then during mapping screen select different "Team" for "Team 1" and "Team 2"
2) During import field mapping screen we see that Assigned To has a new dropdown asking what type of value have we mentioned in excel.
Screenshots attached.