We are a Multi-Tennant using server 201.
If we download an SSRS report from PIlot and then try to upload it to Live - we get an error.
The definition of this report is not valid or supported by this version of Reporting Services. The report definition may have been created with a later version of Reporting Services, or contain content that is not well-formed or not valid based on Reporting Services schemas. Details: The report definition has an invalid target namespace ‘http://schemas.microsoft.com/sqlserver/reporting/2016/01/reportdefinition’ which cannot be upgraded
This almost looks like Pilot is SQL 2016 and Live is SQL 2014.
I have a ticket in with Epicor - however in the mean time - make a backup before making changes.