Duplicates when uploading to LoTW

Nickus de Vos

I'm sure this has been answered before but I can not find it.
Why do I get a warning about duplicate QSO's each time when uploading
to LoTW? It's as if AC Log doesn't keep track of the QSO's it already
uploaded to LoTW in the past.


Nickus - ZR6JN

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