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Once the new definition is created, you can create an instance on the edge device and force the refresh. From the Designer pointing to your edge device force a refresh by switching the provider to MQTT Transmission and selecting the Refresh click box under Transmission Control. This Boolean control will automatically deselect once the BIRTH has been published.

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The new UDT definition will be recorded by MQTT engine and the data processed correctly without impacting the data published from other edge devices. The system can run like this indefinitely with the updated definition imported into any other locations that need to use that new definition.

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• Delete the UDT definition at the MQTT Engine
• Delete all instances of tags using the UDT definition at MQTT Engine
• Delete the stale variant of the UDT definition in all edge devices through out the system
• Export the updated UDT definition from the edge device and import into all other edge devices
• Force a refresh at each edge device

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