diff --git a/src/alpine_bits_python/alpine_bits_helpers.py b/src/alpine_bits_python/alpine_bits_helpers.py
index e09cadd..15fe78b 100644
--- a/src/alpine_bits_python/alpine_bits_helpers.py
+++ b/src/alpine_bits_python/alpine_bits_helpers.py
@@ -800,9 +800,6 @@ def _process_single_reservation(reservation: Reservation, customer: Customer, me
         klick_id = str(klick_id)
 
 
-    
-
-
     utm_medium = (
         str(reservation.utm_medium)
         if reservation.utm_medium is not None and str(reservation.utm_medium) != ""
@@ -813,6 +810,9 @@ def _process_single_reservation(reservation: Reservation, customer: Customer, me
     if klick_id is not None and len(klick_id) > 64:
         klick_id = klick_id[:64]
 
+    if klick_id is "":
+        klick_id = None
+
     hotel_res_id_data = HotelReservationIdData(
         res_id_type="13",
         res_id_value=klick_id,