diff --git a/client/src/components/modals/EditGroupFeesModal.tsx b/client/src/components/modals/EditGroupFeesModal.tsx
index 7bdcf48..3aba36a 100644
--- a/client/src/components/modals/EditGroupFeesModal.tsx
+++ b/client/src/components/modals/EditGroupFeesModal.tsx
@@ -56,18 +56,16 @@ export default function EditGroupFeesModal({ isOpen, onClose, group, onSaved }:
         setError(null);
         setLoading(true);
         try {
-            const body: Record<string, any> = { id: group.id };
-            body.fees = feesNum;
-            body.shipping = shippingNum;
-            body.tip = tipNum;
-            if (discountNum > 0) {
-                body.discountType = discountType;
-                body.discountValue = discountNum;
-            } else {
-                body.discountType = '';
-                body.discountValue = 0;
-            }
-            const res = await updateGroupFees({ body });
+            const res = await updateGroupFees({
+                body: {
+                    id: group.id,
+                    fees: feesNum,
+                    shipping: shippingNum,
+                    tip: tipNum,
+                    discountType: discountNum > 0 ? discountType : undefined,
+                    discountValue: discountNum > 0 ? discountNum : undefined,
+                },
+            });
             if (res.error) {
                 setError((res.error as any).error || 'Nastala chyba');
             } else {
diff --git a/server/src/websocket.ts b/server/src/websocket.ts
index 2257881..fd2cc05 100644
--- a/server/src/websocket.ts
+++ b/server/src/websocket.ts
@@ -32,5 +32,6 @@ export const getWebsocket = () => io;
 
 /** Pošle event konkrétnímu přihlášenému uživateli (pokud je připojen). */
 export const emitToUser = (login: string, event: string, data: unknown) => {
+    if (!io) return;
     io.to(`user:${login}`).emit(event, data);
 }
\ No newline at end of file