probleme mit rekordbox vers.7.0.0...63

hi maybe someone can help me here I have the following problem with rekordbox 7.0.0.0063 when I load tracks into my collection whether via folder or tracks directly I always have some tracks 3 or even 4 times, what could be the reason for this?? I have deleted my collection completely for the 3rd time and reloaded every track....who has this same problem???and has any advice for me