Adding Actor names - Just unknown

So i got problem by adding Actors by copiing missing infos. Here source site for info with acters.
As you can see here are 10 actors. I select them all and copy.
Then i paste (ctrl+c) to plex.
It copy just 9 because they are not added somwhere else. But i allready added movie with Jean Reno. And Jean reno its actually missing.
So i have to add him manually.