Wystąpił błąd

More than one row with the given identifier was found: pl.zeto.koszalin.bip.db.pk.PKIdAndIdDataService@270f, for class: pl.zeto.koszalin.bip.db.model.Document.DocumentContents; nested exception is org.hibernate.HibernateException: More than one row with the given identifier was found: pl.zeto.koszalin.bip.db.pk.PKIdAndIdDataService@270f, for class: pl.zeto.koszalin.bip.db.model.Document.DocumentContents