diff --git a/migrations/Version20240802130923.txt b/migrations/Version20240802130923.txt
index 4de748337..e10e504ed 100644
--- a/migrations/Version20240802130923.txt
+++ b/migrations/Version20240802130923.txt
@@ -44,7 +44,6 @@ final class Version20240802130923 extends AbstractMigration
         $this->addSql('ALTER TABLE profile_role ADD CONSTRAINT FK_E1A105FED60322AC FOREIGN KEY (role_id) REFERENCES role (id) ON DELETE CASCADE');
         $this->addSql('ALTER TABLE transaction ADD CONSTRAINT FK_723705D18157AA0F FOREIGN KEY (profile) REFERENCES profile (id)');
         $this->addSql('ALTER TABLE session CHANGE sess_data sess_data LONGBLOB NOT NULL');
-        $this->addSql('ALTER TABLE session RENAME INDEX session_sess_lifetime_idx TO sess_lifetime_idx');
     }
 
     public function down(Schema $schema): void
@@ -56,7 +55,6 @@ final class Version20240802130923 extends AbstractMigration
         $this->addSql('ALTER TABLE participant_dish DROP FOREIGN KEY FK_41C99E869D1C3019');
         $this->addSql('ALTER TABLE participant_dish DROP FOREIGN KEY FK_41C99E86148EB0CB');
         $this->addSql('ALTER TABLE session CHANGE sess_data sess_data BLOB NOT NULL');
-        $this->addSql('ALTER TABLE session RENAME INDEX sess_lifetime_idx TO session_sess_lifetime_idx');
         $this->addSql('ALTER TABLE profile_role DROP FOREIGN KEY FK_E1A105FECCFA12B8');
         $this->addSql('ALTER TABLE profile_role DROP FOREIGN KEY FK_E1A105FED60322AC');
         $this->addSql('ALTER TABLE guest_invitation DROP FOREIGN KEY FK_CC0531331FB8D185');
diff --git a/migrations/Version20240904104901.php b/migrations/Version20240904104901.php
index 08447a77e..27c063cbc 100644
--- a/migrations/Version20240904104901.php
+++ b/migrations/Version20240904104901.php
@@ -46,7 +46,6 @@ public function up(Schema $schema): void
         $this->addSql('ALTER TABLE profile_role ADD CONSTRAINT FK_E1A105FED60322AC FOREIGN KEY (role_id) REFERENCES role (id) ON DELETE CASCADE');
         $this->addSql('ALTER TABLE transaction ADD CONSTRAINT FK_723705D18157AA0F FOREIGN KEY (profile) REFERENCES profile (id)');
         $this->addSql('ALTER TABLE session CHANGE sess_data sess_data LONGBLOB NOT NULL');
-        $this->addSql('ALTER TABLE session RENAME INDEX session_sess_lifetime_idx TO sess_lifetime_idx');
     }
 
     public function down(Schema $schema): void
@@ -58,7 +57,6 @@ public function down(Schema $schema): void
         $this->addSql('ALTER TABLE participant_dish DROP FOREIGN KEY FK_41C99E869D1C3019');
         $this->addSql('ALTER TABLE participant_dish DROP FOREIGN KEY FK_41C99E86148EB0CB');
         $this->addSql('ALTER TABLE session CHANGE sess_data sess_data BLOB NOT NULL');
-        $this->addSql('ALTER TABLE session RENAME INDEX sess_lifetime_idx TO session_sess_lifetime_idx');
         $this->addSql('ALTER TABLE profile_role DROP FOREIGN KEY FK_E1A105FECCFA12B8');
         $this->addSql('ALTER TABLE profile_role DROP FOREIGN KEY FK_E1A105FED60322AC');
         $this->addSql('ALTER TABLE guest_invitation DROP FOREIGN KEY FK_CC0531331FB8D185');
diff --git a/migrations/Version20240904132158.php b/migrations/Version20240904132158.php
index ec1bda831..6ed0d53c9 100644
--- a/migrations/Version20240904132158.php
+++ b/migrations/Version20240904132158.php
@@ -21,13 +21,11 @@ public function up(Schema $schema): void
     {
         // this up() migration is auto-generated, please modify it to your needs
         $this->addSql('ALTER TABLE guest_invitation CHANGE eventParticipation eventParticipation INT DEFAULT NULL');
-        $this->addSql('ALTER TABLE session RENAME INDEX session_sess_lifetime_idx TO sess_lifetime_idx');
     }
 
     public function down(Schema $schema): void
     {
         // this down() migration is auto-generated, please modify it to your needs
         $this->addSql('ALTER TABLE session RENAME INDEX sess_lifetime_idx TO session_sess_lifetime_idx');
-        $this->addSql('ALTER TABLE guest_invitation CHANGE eventParticipation eventParticipation INT NOT NULL');
     }
 }
diff --git a/migrations/Version20240905081818.php b/migrations/Version20240905081818.php
new file mode 100644
index 000000000..8d7d2b057
--- /dev/null
+++ b/migrations/Version20240905081818.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20240905081818 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE guest_invitation CHANGE eventParticipation eventParticipation INT DEFAULT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql('ALTER TABLE guest_invitation CHANGE eventParticipation eventParticipation INT NOT NULL');
+    }
+}
diff --git a/src/Mealz/MealBundle/Controller/MealGuestController.php b/src/Mealz/MealBundle/Controller/MealGuestController.php
index c4b387467..83fc2332b 100644
--- a/src/Mealz/MealBundle/Controller/MealGuestController.php
+++ b/src/Mealz/MealBundle/Controller/MealGuestController.php
@@ -63,14 +63,14 @@ public function newGuestInvitation(
         #[MapEntity(id: 'dayId')]
         Day $mealDay,
         GuestInvitationRepositoryInterface $guestInvitationRepo,
-        EventParticipation $eventParticipation,
     ): JsonResponse {
+
         $userProfile = $this->getProfile();
         if (null === $userProfile) {
             return new JsonResponse(null, Response::HTTP_FORBIDDEN);
         }
 
-        $guestInvitation = $guestInvitationRepo->findOrCreateInvitation($userProfile, $mealDay, $eventParticipation);
+        $guestInvitation = $guestInvitationRepo->findOrCreateInvitation($userProfile, $mealDay);
 
         return new JsonResponse(['url' => $this->generateInvitationUrl($guestInvitation)], Response::HTTP_OK);
     }
@@ -79,6 +79,7 @@ public function newGuestInvitation(
     public function newGuestEventInvitation(
         Day $dayId,
         GuestInvitationRepositoryInterface $guestInvitationRepo,
+        #[MapEntity(id: 'eventId')]
         EventParticipation $eventParticipation,
     ): JsonResponse {
         $userProfile = $this->getProfile();
diff --git a/src/Mealz/MealBundle/Repository/GuestInvitationRepository.php b/src/Mealz/MealBundle/Repository/GuestInvitationRepository.php
index d5c48706b..b62227685 100644
--- a/src/Mealz/MealBundle/Repository/GuestInvitationRepository.php
+++ b/src/Mealz/MealBundle/Repository/GuestInvitationRepository.php
@@ -24,12 +24,16 @@ class GuestInvitationRepository extends BaseRepository implements GuestInvitatio
      */
     public function findOrCreateInvitation(Profile $host, Day $day, ?EventParticipation $eventParticipation): GuestInvitation
     {
-        $invitation = $this->findOneBy(['host' => $host->getUsername(), 'day' => $day->getId(), 'eventParticipation' => $eventParticipation]);
+        $entityManager = $this->getEntityManager();
+        $eventParticipation?
+        $invitation = $this->findOneBy(['host' => $host->getUsername(), 'day' => $day->getId(), 'eventParticipation' => $eventParticipation->getId()])
+        :
+        $invitation = $this->findOneBy(['host' => $host->getUsername(), 'day' => $day->getId()]);
+        $entityManager->persist($eventParticipation);
+        $entityManager->persist($day);
 
         if (($invitation instanceof GuestInvitation) === false) {
-            $invitation = new GuestInvitation($host, $day);
-
-            $entityManager = $this->getEntityManager();
+            $invitation = new GuestInvitation($host, $day,$eventParticipation);
             $entityManager->persist($invitation);
             $entityManager->flush();
         }
diff --git a/src/Resources/src/api/getEventGuestLink.ts b/src/Resources/src/api/getEventGuestLink.ts
index b60aa107f..08ed23a5e 100644
--- a/src/Resources/src/api/getEventGuestLink.ts
+++ b/src/Resources/src/api/getEventGuestLink.ts
@@ -6,7 +6,7 @@ export default async function getEventGuestLink(eventParticipation?: EventPartic
     console.log('eventParticipation im getEventGuestLink:\n '+ JSON.stringify(eventParticipation));
     // hier kommt undefined beim eventParticipation?.day.date rein
     console.log('DayId:\n '+ JSON.stringify(eventParticipation?.day.dayId));
-    const { error, response: link, request } = useApi<Link>('GET', `/event/invitation/${eventParticipation?.day.dayId}/${eventParticipation?.eventId}`);
+    const { error, response: link, request } = useApi<Link>('GET', `/event/invitation/${eventParticipation?.day.dayId}/${eventParticipation?.participationId}`);
 
     await request();