fix find existing if more than one record

handlers/responsible.go

@@ -54,9 +54,15 @@ func (dh *DatabaseHandler) responsibleExists(CheckResponsible models.Person) (bo
 		return false, errors.New("database not opened")
 	}
 
-	var person models.Person
-	if !dh.database.Exists(&person, "lastName", CheckResponsible.LastName, false) {
+	var persons []models.Person
+	if !dh.database.Exists(&persons, "lastName", CheckResponsible.LastName, false) {
 		return false, nil
 	}
-	return person.FirstName == CheckResponsible.FirstName && person.LastName == CheckResponsible.LastName, nil
+
+	for _, person := range persons {
+		if person.FirstName == CheckResponsible.FirstName && person.LastName == CheckResponsible.LastName {
+			return true, nil
+		}
+	}
+	return false, nil
 }