Save, rebuild and change the values on the datasource back to the ones intended
This results number of ambiguous report parameters. If you can delete old parameters and use new, It will perfectly fine. Its works for me. But it creates problem where report has multiple DataSet ie. PurchOrderconfirm report.
What I configure that there is version difference of report’s dataset and temp Table returned by DRP report. So I revert back report and dataset and First I compiled the temp table and then synchronized it. After that I refreshed the DataSet. The error removed. Later I added custom fields in Temp table and refresh the data set. Report successfully shows the custom report.
Best why, export last version of both report and Temp table. Compile and refresh the report dataset. After that start adding custom filed and refresh data set.