Assume that you run an instance of Microsoft SQL Server 2016 or 2017 Analysis Services in Tabular mode. When you deploy a tabular model database to the instance, you may receive an error message that resembles the following:
Failed to save modifications to the server. Error returned: 'There are ambiguous paths between fact_table_name and dimension_table_name: fact_table_name table_name table_name dimension_table_name and fact_table_name table_name dimension_table_name
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.