diff --git a/BAC0/core/io/Read.py b/BAC0/core/io/Read.py
index 98f5b58..c1f9062 100644
--- a/BAC0/core/io/Read.py
+++ b/BAC0/core/io/Read.py
@@ -314,7 +314,8 @@ async def readMultiple(
                         "",
                     )
                 )
-                dict_values[str(object_identifier)] = []
+                if str(object_identifier) not in dict_values:
+                    dict_values[str(object_identifier)] = []
                 if show_property_name:
                     values.append((property_value, property_identifier))
                     dict_values[str(object_identifier)].append(