Anki doesn't recognize already existing cards

I always used to export my ‘known’ words to Anki.
Anki normally did recognize already existing words/cards and doesn’t create the card again (didn’t make any double cards).

Since this morning it seams that the ‘Note Type’ has changed.

Earlier cards are all Note Type ‘LingQ Card Model V1’, while the new ones are imported as 'Lingq Card Model V1-c3c42".

I think that’s the reason Anki doesn’t recognize already existing cards any more.

How doe I solve this problem.