MarketSight - Append Errors
"Append Failed. Please try again or contact Customer Support for assistance. Additional details: There are duplicated keys in the source dataset."
To make sure the datasets align properly, MarketSight needs unique identifiers to match records. There is at least one duplicate within the source dataset, preventing the append from proceeding.
How to Solve
Locate and edit the duplicate keys to ensure all are unique, then re-upload the dataset.