Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Cannot insert explicit value for identity column in table 'Agent' when IDENTITY_INSERT is set to OFF.

configService=net.fractech.ops.fds.db.service.ConfigService@59dbd
Hibernate:
    /* insert net.fractech.ops.fds.db.domain.MinorStage
        */ insert
        into
            Minor_Stage
            (End_DateTime, Major_Stage_ID_FK, Stage_Number, Start_DateTime)
        values
            (?, ?, ?, ?)
Hibernate:
    /* insert net.fractech.ops.fds.db.domain.MinorStageConfig
        */ insert
        into
            Minor_Stage_Configuration
            (FDS_Minor_Stage_Configuration_ID, Minor_Stage_ID_FK)
        values
            (?, ?)
Hibernate:
    /* insert net.fractech.ops.fds.db.domain.Agent
        */ insert
        into
            Agent
            (Agent_Name, Agent_Type, FDS_Agent_ID, Minor_Stage_Configuration_ID_FK, Minor_Stage_ID_FK)
        values
            (?, ?, ?, ?, ?)

@Service
public class ConfigService implements IConfigService {
   @Autowired(required = true)
   IMinorStageDAO minorStageDAO;

   public void processConfigEvent() throws InvalidDatabaseOperationException  {
      MinorStage minorStage = null;
      final int minorStageNumber = 1;

      minorStage = new MinorStage();

      minorStage.setMajorStageIdFK(10);
      minorStage.setStageNumber(minorStageNumber);
      minorStage.setStartTimestamp(new Date());

      final MinorStageConfig minorStageConfig = new MinorStageConfig();

      minorStageConfig.init(5, minorStage);

      minorStage.getMinorStageConfigurations().add(minorStageConfig);

      final Agent agent = new Agent();

      agent.init(minorStageConfig, "id1", "agentName1", "agentType1");

      minorStageConfig.getAgents().add(agent);

      this.minorStageDAO.save(minorStage);
   }
}

@Entity
@Table(name="Minor_Stage")
public class MinorStage implements Serializable {
   private static final long serialVersionUID = -7072856325780739098L;

   private List<MinorStageConfig> minorStageConfigs = new ArrayList<MinorStageConfig>();
   private Date endTimestamp;
   private Date startTimestamp;
   private Integer id;
   private Integer majorStageIdFK;
   private Integer stageNumber;

   @Column(name="End_DateTime")
   @DateTimeFormat(style = "M-")
   @Temporal(TemporalType.TIMESTAMP)
   public Date getEndTimestamp(){return(this.endTimestamp);}
   public void setEndTimestamp(final Date endTimestamp_){this.endTimestamp = endTimestamp_;}

   @Id
   @Column(name="FDS_Minor_Stage_ID")
   @GeneratedValue(strategy=GenerationType.IDENTITY)
   public Integer getId(){return(this.id);}
   public void setId(final Integer id_){this.id = id_;}

   @NotNull
   @Column(name="Major_Stage_ID_FK")
   public Integer getMajorStageIdFK(){return(this.majorStageIdFK);}
   public void setMajorStageIdFK(final Integer majorStageIdFK_){this.majorStageIdFK = majorStageIdFK_;}

   @NotNull
   @Column(name="Stage_Number")
   public Integer getStageNumber(){return(this.stageNumber);}
   public void setStageNumber(final Integer stageNumber_){this.stageNumber = stageNumber_;}

   @NotNull
   @Column(name="Start_DateTime")
   @DateTimeFormat(style = "M-")
   @Temporal(TemporalType.TIMESTAMP)
   public Date getStartTimestamp(){return(this.startTimestamp);}
   public void setStartTimestamp(final Date startTimestamp_){this.startTimestamp = startTimestamp_;}

   @OneToMany(orphanRemoval=true, cascade=CascadeType.ALL,
              mappedBy="minorStage", fetch=FetchType.LAZY)
   public List<MinorStageConfig> getMinorStageConfigurations(){return(this.minorStageConfigs);}
   public void setMinorStageConfigurations(final List<MinorStageConfig> minorStageConfigs_){this.minorStageConfigs = minorStageConfigs_;}
}

@Configurable
@Entity
@Table(name="Minor_Stage_Configuration")
public class MinorStageConfig implements Serializable
{
   private List<Agent> agents = new ArrayList<Agent>();
   private MinorStage minorStage;
   private MinorStageConfigPK primaryKey;

   public MinorStageConfig(){}
   public void init(final Integer id_,
                    final MinorStage minorStage_){
      this.primaryKey = new MinorStageConfigPK(id_);

      this.setMinorStage(minorStage_);
   }

   @EmbeddedId
   public MinorStageConfigPK getPrimaryKey(){return(this.primaryKey);}
   public void setPrimaryKey(final MinorStageConfigPK minorStageConfigPK_){this.primaryKey = minorStageConfigPK_;}

   @OneToMany(orphanRemoval=true, cascade=CascadeType.ALL,
              mappedBy="minorStageConfig", fetch=FetchType.LAZY)
   public List<Agent> getAgents(){return(this.agents);}
   public void setAgents(final List<Agent> agents_){this.agents = agents_;}

   @NotNull
   @ManyToOne(cascade=CascadeType.ALL)
   @JoinColumn(name="Minor_Stage_ID_FK",
               referencedColumnName="FDS_Minor_Stage_ID",
               insertable=false,updatable=false)
   public MinorStage getMinorStage(){return(this.minorStage);}
   public void setMinorStage(final MinorStage minorStage_){
      this.minorStage = minorStage_;

      if(this.minorStage.getId() != null){this.primaryKey.setMinorStageIdFK(this.minorStage.getId());}
   }
}

@Configurable
@Embeddable
public class MinorStageConfigPK implements Serializable
{
   private Integer id;
   private Integer minorStageIdFK;

   public MinorStageConfigPK(){}
   public MinorStageConfigPK(final Integer minorStageConfigId_){this.id = minorStageConfigId_;}

   @Column(name="FDS_Minor_Stage_Configuration_ID")
   public Integer getId(){return(this.id);}
   public void setId(final Integer id_){this.id = id_;}

   @NotNull
   @Column(name="Minor_Stage_ID_FK")
   public Integer getMinorStageIdFK(){return(this.minorStageIdFK);}
   public void setMinorStageIdFK(final Integer minorStageIdFK_){this.minorStageIdFK = minorStageIdFK_;}

   public boolean equals(final Object obj_){
      if(this == obj_){return(true);}

      if(obj_ == null || !(obj_ instanceof MinorStageConfigPK)){return(false);}

      final MinorStageConfigPK other = (MinorStageConfigPK)obj_;

      if(this.id == null){if(other.id != null){return(false);}}
      else if(!this.id.equals(other.id)){return(false);}

      if(this.minorStageIdFK == null){if(other.minorStageIdFK != null){return(false);}}
      else if(!this.minorStageIdFK.equals(other.minorStageIdFK)){return(false);}

      return(true);
   }

   public int hashCode(){
      // generate hashcode based on parameter values
      final int prime = 31;
      int result = 17;
      result = prime * result + (this.id == null ? 0 : this.id.hashCode());
      result = prime * result + (this.minorStageIdFK == null ? 0 : this.minorStageIdFK.hashCode());

      return(result);
   }
}

@Configurable
@Entity
@Table(name="Agent")
public class Agent implements Serializable
{
   private AgentPK primaryKey;
   private MinorStageConfig minorStageConfig;
   private String id;
   private String name;
   private String type;

   public Agent(){}

   public void init(final MinorStageConfig minorStageConfig_,final String id_,final String name_,final String type_)
   {
      this.primaryKey = new AgentPK(minorStageConfig_);
      this.minorStageConfig = minorStageConfig_;
      this.id = id_;
      this.name = name_;
      this.type = type_;
   }

   @NotNull
   @Column(name="Agent_ID",length=50)
   public String geId(){return(this.id);}
   public void setId(final String id_){this.id = id_;}

   @NotNull
   @Column(name="Agent_Name",length=50)
   public String getName(){return(this.name);}
   public void setName(final String name_){this.name = name_;}

   @EmbeddedId
   public AgentPK getPrimaryKey(){return(this.primaryKey);}
   public void setPrimaryKey(final AgentPK agentPK_){this.primaryKey = agentPK_;}

   @NotNull
   @Column(name="Agent_Type",length=50)
   public String getType(){return(this.type);}
   public void setType(final String type_){this.type = type_;}

   @NotNull
   @ManyToOne(cascade=CascadeType.ALL)
   @JoinColumns({@JoinColumn(name="Minor_Stage_Configuration_ID_FK",
                  referencedColumnName="FDS_Minor_Stage_Configuration_ID",
                  insertable=false,updatable=false),
      @JoinColumn(name="Minor_Stage_ID_FK",
                  referencedColumnName="Minor_Stage_ID_FK",
                  insertable=false,updatable=false)})
   public MinorStageConfig getMinorStageConfig(){return(this.minorStageConfig);}
   public void setMinorStageConfig(final MinorStageConfig minorStageConfig_){this.minorStageConfig = minorStageConfig_;}
}

@Configurable
@Embeddable
public class AgentPK implements Serializable {
   private Integer id;
   private Integer minorStageIdFK;
   private Integer minorStageConfigIdFK;
   private MinorStageConfig minorStageConfig;

   public AgentPK()   {}
   public AgentPK(final MinorStageConfig minorStageConfig_) {this.minorStageConfig = minorStageConfig_;}

   @Column(name="FDS_Agent_ID")
   @GeneratedValue(strategy=GenerationType.IDENTITY)
   public Integer getId() { return(this.id);}
   public void setId(final Integer id_) {this.id = id_;}

   @NotNull
   @Column(name="Minor_Stage_ID_FK")
   public Integer getMinorStageIdFK() {
      if(this.minorStageConfig != null){
         this.minorStageIdFK = this.minorStageConfig.getPrimaryKey().getMinorStageIdFK();
      }

      return(this.minorStageIdFK);
   }
   public void setMinorStageIdFK(final Integer minorStageIdFK_){this.minorStageIdFK = minorStageIdFK_;}

   @NotNull
   @Column(name="Minor_Stage_Configuration_ID_FK")
   public Integer getMinorStageConfigIdFK(){
      if(this.minorStageConfig != null){
         this.minorStageConfigIdFK = this.minorStageConfig.getPrimaryKey().getId();
      }

      return(this.minorStageConfigIdFK);
   }
   public void setMinorStageConfigIdFK(final Integer minorStageConfigIdFK_){this.minorStageConfigIdFK = minorStageConfigIdFK_;}

   @Override
   public boolean equals(final Object obj_){
      if(this == obj_){return(true);}
      if(obj_ == null || !(obj_ instanceof AgentPK)){return(false);}
      final AgentPK other = (AgentPK)obj_;
      if(this.id == null){if(other.id != null){return(false);}}
      else if(!this.id.equals(other.id)){return(false);}
      if(this.minorStageIdFK == null){
         if(other.minorStageIdFK != null){return(false);}
      }
      else if(!this.minorStageIdFK.equals(other.minorStageIdFK)){return(false);}
      if(this.minorStageConfigIdFK == null){
         if(other.minorStageConfigIdFK != null){
            return(false);
         }
      }
      else if(!this.minorStageConfigIdFK.equals(other.minorStageConfigIdFK)){return(false);}

      return(true);
   }

   public int hashCode()  {
      final int prime = 31;
      int result = 17;
      result = prime * result + (this.id == null ? 0 : this.id.hashCode());
      result = prime * result + (this.minorStageIdFK == null ? 0 : this.minorStageIdFK.hashCode());
      result = prime * result + (this.minorStageConfigIdFK == null ? 0 : this.minorStageConfigIdFK.hashCode());
      return(result);
   }
}