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PowerApps Dataflow SQL connection ERROR

I had a Dataflow connected to SQL server which is working without any problem until couple days ago, and I suddently start to getting the error message below, the DB connected successfully, this happen every time when try to access a table or view. 


DataSource.Error: Microsoft SQL: Invalid column name 'generated_always_type'.


DataSourceKind = SQL

DataSourcePath = Server;DB (removed the actual info)

Message = Invalid column name 'generated_always_type'.

ErrorCode = -2146232060

Number = 207

Class = 16


The Sql query on PowerApps is:


  Source = Sql.Database("server", "DB name"),

  Navigation = Source{[Schema = "dbo", Item = "Account"]}[Data]


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