If you are working with SSDT 2017 and creating reports for earlier versions of SSRS, please read the following article!

• https://docs.microsoft.com/en-us/sql/reporting-services/tools/deployment-and-version-support-in-sql-server-data-tools-ssrs?view=sql-server-2017

I really think MS did a great job here with the “TargetServerVersion” property functionality, which allows reports to convert to previous SSRS formats during deployment.