diff --git a/backend/models/associations.js b/backend/models/associations.js
index d445af5..1f417aa 100644
--- a/backend/models/associations.js
+++ b/backend/models/associations.js
@@ -569,14 +569,14 @@ export default function setupAssociations() {
 
   Party.belongsToMany(TitleOfNobility, {
     through: PartyInvitedNobility,
-    foreignKey: 'party_id',
-    otherKey: 'title_of_nobility_id',
+    foreignKey: 'partyId',
+    otherKey: 'titleOfNobilityId',
     as: 'invitedNobilities',
   });
   TitleOfNobility.belongsToMany(Party, {
     through: PartyInvitedNobility,
-    foreignKey: 'title_of_nobility_id',
-    otherKey: 'party_id',
+    foreignKey: 'titleOfNobilityId',
+    otherKey: 'partyId',
     as: 'partiesInvitedTo',
   });
 
diff --git a/backend/services/falukantService.js b/backend/services/falukantService.js
index de1d370..e5bb5f4 100644
--- a/backend/services/falukantService.js
+++ b/backend/services/falukantService.js
@@ -3225,6 +3225,10 @@ class FalukantService extends BaseService {
             cost: cost
         });
         if (nobilities.length > 0) {
+            // Stelle sicher, dass die Party eine ID hat
+            if (!party.id) {
+                throw new Error('Party wurde erstellt, hat aber keine ID');
+            }
             // Verwende die bereits geladenen Objekte
             await party.addInvitedNobilities(nobilities);
         }