diff --git a/app/carnet/page.tsx b/app/carnet/page.tsx
index 3195ad1c..e306b5c1 100644
--- a/app/carnet/page.tsx
+++ b/app/carnet/page.tsx
@@ -393,18 +393,33 @@ export default function CarnetPage() {
       }
       
       const { content } = await response.json();
-      const contacts = parseVCardContent(content);
+      
+      // Split the content into individual vCards
+      const vcards = content.split('BEGIN:VCARD').filter(section => section.trim());
       
       // Update or add the contact
-      const existingIndex = contacts.findIndex(c => c.id === contact.id);
-      if (existingIndex >= 0) {
-        contacts[existingIndex] = contact;
-      } else {
-        contacts.push(contact);
+      let updatedVcards: string[] = [];
+      let contactUpdated = false;
+      
+      for (const section of vcards) {
+        const vcard = parseVCard('BEGIN:VCARD' + section);
+        if (vcard.uid?.[0]?.value === contact.id) {
+          // Replace the existing contact
+          updatedVcards.push(generateVCardContent(contact));
+          contactUpdated = true;
+        } else {
+          // Keep the existing contact
+          updatedVcards.push('BEGIN:VCARD' + section);
+        }
       }
       
-      // Generate new VCF content
-      const vcfContent = contacts.map(c => generateVCardContent(c)).join('\n');
+      // If contact wasn't found, add it as new
+      if (!contactUpdated) {
+        updatedVcards.push(generateVCardContent(contact));
+      }
+      
+      // Join all vCards back together
+      const vcfContent = updatedVcards.join('\n');
       
       // Save the updated VCF file
       const saveResponse = await fetch('/api/nextcloud/files', {