I have two boards, and I added a rule to the board buttons. When I press the button, I need to copy the cards that include red labels and paste them onto another board.
However, when I press the button more than once, it repeats the process of copying the same cards.
What I actually need is that when I press the button again, it should copy only the cards that have a red label after I pressed it for the first time, without duplicating the cards on the other board.
You could do this by either:
As a bonus, there is a really good duplicate deletion hack in Trello, which you could add to the receiving board:
When a card is added to the board, lookup the card titled {triggercardname} and archive the card
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