# After Node-Red update : Flows stopped due to missing node types. \* mqtt-config

**URL:** <https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748>\
**Category:** General\
**Tags:** mqtt\
**Created:** [27 December 2021 11:22 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748 "2021-12-27T11:22:16Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Tinchen9b](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/tinchen9b/32/53121_2.png) [@Tinchen9b](https://discourse.nodered.org/u/Tinchen9b)\
**Post date:** [27 December 2021 11:22 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748/1 "2021-12-27T11:22:16Z")

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Hello,

I have run today an update on Node-Red and also zigbee2mqtt nodes and since then I am getting following error:

Flows stopped due to missing node types.

- mqtt-config

I have tried to run the update the second time - no change.  
Can I roll back?

I have also tried to delete all, but did not helped.  
Any idea how to resove it? It is a bit bigger project, so I can not just deinstall it all and delete..

Thank you!

 ![2021-12-27_12-16-27](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/b/d/bd4e6de2f16c0f51c01763d314cc331f0a32563b.jpeg)

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**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [27 December 2021 11:31 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748/2 "2021-12-27T11:31:56Z")

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Hi @Tinchen9b welcome to the forum.

Can you stop Node-red and then start it again and copy the startup log and paste it to a reply.  
Also what version of Pi are you runing (use `cat /proc/device-tree/model`)  
and what linux release (use `cat /etc/os-release`)

> [@Tinchen9b](#):
>
> Can I roll back?

Node-RED saves `one` backup when you hit deploy. So unless you have deployed `only once`, you would have to go to a maual backup...if you have any.

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<div class="post-metadata">

**Author:** ![Tinchen9b](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/tinchen9b/32/53121_2.png) [@Tinchen9b](https://discourse.nodered.org/u/Tinchen9b)\
**Post date:** [27 December 2021 11:38 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748/3 "2021-12-27T11:38:18Z")

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I was able to find it in the right menu and then delete it from there. It was not visible on the UI 🤨

Now its is gone, it works again.

 ![2021-12-27_12-37-33](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/3/63c52a365a6c6f0af885fe3996a8e7eacef56b5b.jpeg)

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<div class="post-metadata">

**Author:** ![zenofmud](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/zenofmud/32/316_2.png) [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Post date:** [27 December 2021 12:16 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748/4 "2021-12-27T12:16:38Z")

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> [@Tinchen9b](#):
>
> It was not visible on the UI

That is because it is a configuration node. This is explained in the documentation: [Node-RED Concepts : Node-RED](https://nodered.org/docs/user-guide/concepts#config-node)

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [10 January 2022 12:16 UTC](https://discourse.nodered.org/t/after-node-red-update-flows-stopped-due-to-missing-node-types-mqtt-config/55748/5 "2022-01-10T12:16:41Z")

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