Often while working with SQL Server Analysis Services, developers come across many errors that restrict them from deploying or processing the cube. In this article, I’m going to explain the reason that causes the Duplicate Key error in SSAS. This is one of the errors that occurs quite frequently and is usually caused by the incorrect configuration of the key properties of the dimension members. I’ll try to replicate the error first and then explain how this error can be resolved.
Please note that this article focuses on how to resolve the error and doesn’t explain how to create