Using GetRows on the QuoteDtl table in Vantage 8.03.405A

When I do a GetRows on the QuoteDtl table I get a "Failed to enable Constraints" error message, because of "one or more rows contain values violating non-null, unique, or foreign key contraints" How do I find the bad row in a quote, and delete it so GetRows will work again? Has anybody else encountered this, and how did you fix it.