[Dxbase] Multiple time printing same labels

[ILYA ZOZIN 4Z1UF]

 Hi team,
 I've just tried to print the QSL label that already has been printed in the
past. In order to send the QSL again.
  I've got a very long error message, saying that it's impossible cause "the
changes you requesting will  create a duplicate values..." etc. I have a
screenshot, but it will not pass here.
 What I'm doing wrong? Is there a way to print the same QSO label multiple
times, despite you did it in the past?
73! ILYA de 4Z1UF