diff --git a/DiscoverUM3Action.py b/DiscoverUM3Action.py
index 8fed85d3e1..27c5ef6638 100644
--- a/DiscoverUM3Action.py
+++ b/DiscoverUM3Action.py
@@ -38,7 +38,7 @@ class DiscoverUM3Action(MachineAction):
     def setKey(self, key):
         global_container_stack = Application.getInstance().getGlobalContainerStack()
         if global_container_stack:
-            if "key" in global_container_stack.getMetaData():
+            if "um_network_key" in global_container_stack.getMetaData():
                 global_container_stack.setMetaDataEntry("um_network_key", key)
             else:
                 global_container_stack.addMetaDataEntry("um_network_key", key)