diff --git a/backend/app/plan/router.py b/backend/app/plan/router.py
index e5a2aa79..7200d2ef 100644
--- a/backend/app/plan/router.py
+++ b/backend/app/plan/router.py
@@ -52,6 +52,8 @@ def patch_epc(patch, epc_records):
     """
 
     for patch_variable, patch_value in patch.items():
+        if patch_value == "":
+            continue
         if patch_variable in epc_records["original_epc"]:
             epc_records["original_epc"][patch_variable] = patch_value
 
diff --git a/etl/customers/immo/pilot/asset_list.py b/etl/customers/immo/pilot/asset_list.py
index 57fa5957..6329a2be 100644
--- a/etl/customers/immo/pilot/asset_list.py
+++ b/etl/customers/immo/pilot/asset_list.py
@@ -46,7 +46,7 @@ patches = [
     },
     {
         'address': '53 Bromley', 'postcode': 'DY5 4PJ',
-        'walls-description': 'Cavity wall, partial insulation',
+        'walls-description': 'Cavity wall, partial insulation (assumed)',
     },
 ]