diff --git a/backend/main.py b/backend/main.py
index e8564ce..3dda3f2 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -81,16 +81,10 @@ def _fix_template_parameters():
         ).first()
         
         if template:
-            # Correct body parameters to match what send_wedding_invitation_bulk sends
-            correct_params = [
-                "contact_name",
-                "groom_name",
-                "bride_name",
-                "venue",
-                "event_date",
-                "event_time",
-                "guest_link"
-            ]
+            # Correct body parameters to match the template structure:
+            # - Body has 1 placeholder {{1}} = contact_name
+            # - Button has 1 placeholder {{1}} = event_id (handled separately via button_param_key)
+            correct_params = ["contact_name"]
             
             current_params = json.loads(template.body_params or "[]")
             if current_params != correct_params:
@@ -2056,16 +2050,10 @@ async def fix_templates(db: Session = Depends(get_db)):
                 "message": "hina_invitation template not found in database"
             }
         
-        # Correct body parameters to match what send_wedding_invitation_bulk sends
-        correct_params = [
-            "contact_name",
-            "groom_name",
-            "bride_name",
-            "venue",
-            "event_date",
-            "event_time",
-            "guest_link"
-        ]
+        # Correct body parameters to match the template structure:
+        # - Body has 1 placeholder {{1}} = contact_name
+        # - Button has 1 placeholder {{1}} = event_id (handled separately via button_param_key)
+        correct_params = ["contact_name"]
         
         old_params = template.body_params
         template.body_params = json.dumps(correct_params)