ensure that _indicators_needed_to_calc has distinct indicators
ensure that _indicators_needed_to_calc has distinct indicators

unicef/polio,SeedScientific/polio,unicef/rhizome,unicef/rhizome,SeedScientific/polio,unicef/rhizome,SeedScientific/polio,unicef/polio,SeedScientific/polio,unicef/polio,unicef/rhizome,SeedScientific/polio,unicef/polio