000980 : Domain value <value> description <value> already exists as description <value>.
Description
The specified coded value already exists within the workspace. The field representing the code value may also containing duplicate values.
Solution
Check for duplicates between the input table and the new code values that will be imported and existing code value already in the geodatabase. Also, check for duplicate values in the field in the input table that will be used for the code values. Learn more about attribute domains.
11/18/2010