diff --git a/frontend/src/client/schemas.gen.ts b/frontend/src/client/schemas.gen.ts
index fc9c6e4..3b339cc 100644
--- a/frontend/src/client/schemas.gen.ts
+++ b/frontend/src/client/schemas.gen.ts
@@ -1182,12 +1182,19 @@ export const GuestCreateSchema = {
       default: false,
     },
     invitation_code: {
-      type: "string",
+      anyOf: [
+        {
+          type: "string",
+        },
+        {
+          type: "null",
+        },
+      ],
       title: "Invitation Code",
     },
   },
   type: "object",
-  required: ["event_id", "invited_by", "full_name", "invitation_code"],
+  required: ["event_id", "invited_by", "full_name"],
   title: "GuestCreate",
 } as const;
 
@@ -1339,6 +1346,10 @@ export const GuestReadSchema = {
       type: "boolean",
       title: "Is Blocked",
     },
+    invitation_code: {
+      type: "string",
+      title: "Invitation Code",
+    },
   },
   type: "object",
   required: [
@@ -1349,6 +1360,7 @@ export const GuestReadSchema = {
     "status",
     "actual_additional_guests",
     "is_blocked",
+    "invitation_code",
   ],
   title: "GuestRead",
 } as const;
diff --git a/frontend/src/client/types.gen.ts b/frontend/src/client/types.gen.ts
index 1b37e0a..75ca693 100644
--- a/frontend/src/client/types.gen.ts
+++ b/frontend/src/client/types.gen.ts
@@ -181,7 +181,7 @@ export type GuestCreate = {
     [key: string]: unknown;
   } | null;
   can_bring_guests?: boolean | null;
-  invitation_code: string;
+  invitation_code?: string | null;
 };
 
 export type GuestRead = {
@@ -204,6 +204,7 @@ export type GuestRead = {
   response_date?: string | null;
   actual_additional_guests: number;
   is_blocked: boolean;
+  invitation_code: string;
 };
 
 export type GuestStatus =