Reminds me of trump repeatedly trying to make trade deals with individual EU countries. Only had to explain it 11 times until for it to sink it. https://www.businessinsider.com/trump-trade-merkel-germany-e...
It worked for Putin (see Nord Streams for example) so Trump wanted it too :)
The EU doesn't mind exceptions to her rules once it can approve or disapprove of them thus preserving the EU trading bloc. People really do think there is a 'gotcha' though e.g. US President Trump getting schooled by Merkel thinking he could just repeat the question and she would give in. I can assure you though these things are very rules based.