Spring JPA save Single Entity cleared all existing postgresql table Data - postgresql

Question

IMPL Class has following JPA SAVE statment.
detailBlockEntity.setLastUpdateUserId(ctx.getUserId());
detailBlockEntity.setOriginalUserId(ctx.getUserId());
DetailBlockEntity detailtBlockEntityRsp = detailBlockRepository.save(detailBlockEntity);
Entity Class:
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQuery;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;
import org.hibernate.annotations.Type;
import org.hibernate.annotations.TypeDef;
#Entity
#Table(
name = "detail_block",
schema = "pcrowner"
)
#TypeDef(
name = "StringJsonObject",
typeClass = StringJsonUserType.class
)
#NamedQuery(
name = "DetailBlockEntity.findAll",
query = "SELECT dtlBlock FROM DetailBlockEntity dtlBlock"
)
public class DetailBlockEntity extends BaseModelEntity {
private static final long serialVersionUID = -12477273943220535090L;
#Id
#GeneratedValue(
generator = "detail_block_seq",
strategy = GenerationType.SEQUENCE
)
#SequenceGenerator(
name = "detail_block_seq",
sequenceName = "detail_block_seq",
allocationSize = 10,
schema = "pcrowner"
)
#Column(
name = "detail_block_id",
unique = true,
nullable = false,
precision = 38
)
private Long id;
#Column(
name = "category_name"
)
private String ctgName;
Save execute on POSTGRE SQL Table cleared all existing data. Nothing strange in logs. It just happend behind the scenes. Please let me know if any one has any idea whats going on here?
I expected only one record to be saved in table. But instead cleared all data in table.