Duplicate Card in anki (reupload)

When creating a card, another similar card is created alone and when trying to delete this duplicate card, the original is also deleted. (G Translate)

You can’t delete individual cards (unless you redefine their front template to be blank), you can only delete notes. A note can define more than one card.

For example, a “Basic (and reversed card)” notetype creates two cards. Perhaps you are doing something similar.