erro insert

alguem sabe que erro é esse como posso resolver, estou executando um insert

00001. 00000 - "unique constraint (%s.%s) violated"

*Cause: An UPDATE or INSERT statement attempted to insert a duplicate key.

For Trusted Oracle configured in DBMS MAC mode, you may see

this message if a duplicate entry exists at a different level.

*Action: Either remove the unique restriction or do not insert the key.