Translate the following English sentence to French:
"This is an incredibly important question when it comes to creating solidarity in Europe, not only among the present Member States but also among the candidate States, which are otherwise at great risk of falling behind in this context."
C'est une question capitale en ce qui concerne la création de la cohésion en Europe, non seulement entre les actuels États membres, mais aussi avec les pays candidats, qui, sans cela, risqueront de rester en arrière.