Hello @Adel_de_Clevermate,
I see that you were able to resolve the previous issue, that looks very related to this one, by redefining the replaceFieldOperator on your collection.
I would also suspect the same issue for your c_candidatures collection as I see a similarly named field: action_enum. Would it happen to be the same case of a smart field with a replaceFieldOperator defined on your collection ?