002852: <Value>: <Value> exists within geodatabase as <value>. A feature class name can only exist once within a geodatabase, including within all feature datasets.

Description

Copying or overwriting a feature class in a feature dataset will fail if the feature class already exists in the output geodatabase or in a feature dataset in the geodatabase.

Solution

If the name already exists in the output file geodatabase, use a unique name for output feature classes.