UPDATE: Changing the edition/printing/set of a card is now possible! 😃
You can change the printing of a card on the web platform. This is useful for when you notice a card has been added as the wrong version.
To change a card's printing:
Find the card that needs editing* (you can use the search or filter options to find it quickly).
Click on the card to open the panel with more details, then click Edit.
Click the box that displays the card's current printing - this will load the other printings for that card.
Click that box again to open a drop down menu with all the printings of that card.
Select the correct printing and then click Save.
*Use the grouping options to make sure you are changing the printing of just one or multiple copies of a card. Select None to edit individual cards or Printing/Name to edit a group of similar cards.