I know that when the two connected sentences have the same subject, I should use
um .. zu and when the subject is different
damit. I was just reading a text in a german "Lehrbuch" when I saw the following sentence:
"Wir haben in der Arbeit doch so ein Team-Seminar gemacht, damit wir wieder ein starkes Team werden."
Could someone explain me why in this case
damit was used since the subject is the same? (wir)