DTP failing with a particular error

Hi Team,

I have a dtp failing which loads data from one write optimized dso to another write optimized dso. Its is a full update and has got some selections in the filter. It runs once in a month .

Error message is : "Duplicate data record detected (DS "zabgx" datapackage : 0030, data record: 1253) "

Regards,

Rajesh.