I got the Failed to do column assignments for list error in my SharePoint logs today.
Ok, so a quick google/bing and I found this article:
http://gordonduthie.net/2011/03/24/failed-to-do-column-assignments-for-list
That’s easy …
No, it is  not the same issue. I don’;t have any ColNames specified  It looks like the error Failed to do column assignments for list means something is wrong with the fields in your schema.xml file.
In my case, I had two copies of the same field in my schema.xml. So why is the same error appearing for both these situations?
SharePoint goes through the fields specified in the list definition and creates the field.
The second time the same field is being created the internal name of the field already exist and therefore it can’t be assigned.
This is great! The error actually said what was wrong. I just wish that it had been a bit clearer 30 minutes ago.
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Pieter Veenstra
Is your business still running on paper trails, sprawling Excel files, or ageing Access databases? There's a better way — and I can show you exactly what it looks like. I'm the Technical Director of Vantage 365, a Microsoft solutions consultancy working with clients across the UK, the Netherlands, and worldwide. For over 30 years I've been turning messy, manual business processes into clean, automated systems that save time, reduce errors, and give teams the visibility they need to make better decisions. SharePains is not just any blog run by a Microsoft MVP. Have you ever used Try-Catch in Power Automate? The original post about Try-Catch in Power Automate can still be found on this site, https://sharepains.com/2018/02/07/try-catch-finally-in-power-automate-flow/ Or have you ever used the Pieter’s method to avoid variables and speed up your flows? https://sharepains.com/2020/03/11/pieters-method-for-advanced-in-flows/ You can contact me using contact@sharepains.com