Message Oracle ORA-40289 - duplicate attributes provided for data mining function

ERRORduplicate attributes provided for data mining function
CAUSEA duplicate, non-nested attribute was provided as input to the data mining function. A duplicate attribute is one which is present in the model signature, occurs more than once in the USING clause after tablename expansion, and is not a collection element in a nested table column.
ACTIONEliminate the duplicate attribute(s).