The report server at '{0}' is an earlier version than the one specified in the TargetServerVersion property. The RDL files ...

The report server at '{0}' is an earlier version than the one specified in the TargetServerVersion property. The RDL files generated by the build process are incompatible with the report server. Change TargetServerVersion to '{1}' then Clean and Rebuild to generate RDL with matching schema.