# UDT Definitions not propagating to enigine

**URL:** <https://forum.cirrus-link.com/t/udt-definitions-not-propagating-to-enigine/89>\
**Category:** MQTT Modules\
**Created:** [June 21, 2021, 8:06am UTC](https://forum.cirrus-link.com/t/udt-definitions-not-propagating-to-enigine/89 "2021-06-21T08:06:45Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Fielies](https://avatars.discourse-cdn.com/v4/letter/f/d9b06d/32.png) [@Fielies](https://forum.cirrus-link.com/u/Fielies)\
**Post date:** [June 22, 2021, 2:20pm UTC](https://forum.cirrus-link.com/t/udt-definitions-not-propagating-to-enigine/89/4 "2021-06-22T14:20:06Z")

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Or can I assume that since the Ignition edge version and its transmission version are stable, it won’t be affected by updating the Main Cloud Ignition GW to 8.1.7?

Basically tying in to what Wes said in a different post

> [@Versioning best practice](https://forum.cirrus-link.com/t/versioning-best-practice/88/2):
>
> The versions do not have to be the same. Both sides implement Sparkplug B so they do not have to remain on the same module version. However, as with any software upgrades may be required. The Ignition gateway network and the EAM module may be helpful in this regard.

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