---
title: "Discussion on \"The Golden Rule of Data Transformation: Go Upstream\n\" | Hashnode"
description: "Discussion on \"The Golden Rule of Data Transformation: Go Upstream\n\". Introduction\nIf you work with large Import mode semantic models in Power BI, you've probably been there — a model that ran perfectly for months suddenly starts failing refresh. No code changes. No new"
url: "https://hashnode.com/posts/the-golden-rule-of-data-transformation-go-upstream/69c9fa315282e6ac9c3a7c52"
---

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# [The Golden Rule of Data Transformation: Go Upstream](https://karthikbi.hashnode.dev/the-golden-rule-of-data-transformation-go-upstream?utm_source=hashnode&utm_medium=feed)

Introduction If you work with large Import mode semantic models in Power BI, you've probably been there — a model that ran perfectly for months suddenly starts failing refresh. No code changes. No new

Mar 30 · 3 min read · karthikbi.hashnode.dev  
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[Karthik Pandy](https://hashnode.com/@kpandy)

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