Unwanted drop down arrow appears

I have created a drop down list and now for some reason another drop down arrow appears in the same spot (see picture below). When I click on it (without clicking on the cell) I get a dropdown with only a blank option. Then when I click on the cell itself the arrow for the drop down list that I actually created, appears and I can choose from my drop down list (but the other drop down arrow can still be seen in the background).

How can I get rid of this unwanted drop down arrow?

Capture excel.PNG