OpenJPA Parent Child casacade insert issue

@Entity
@Table(name = "CNTC_RLTNSHP")
public class ContactRelationship  implements Serializable { // Parent
	private static final long serialVersionUID = 1L;

	@Id
	@Column(name = "O_CNTC_RLTNSHP_ID", updatable = false)
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Integer contactRelationshipID;

	@Column(name = "O_WRK_ID")
	private Long odsID;

	@OneToMany(mappedBy = "phoneContactRelationship", cascade = CascadeType.ALL, orphanRemoval = true, fetch = FetchType.EAGER, targetEntity = ContactRelationshipPhone.class)
	private List<ContactRelationshipPhone> contactRelationshipPhones;
	
 // Getters,setters,hashcode,equals
 
 
 --Child class 
 
@Entity
@Table(name = "CNTC_RLTNSHP_PH")
public class ContactRelationshipPhone  implements Serializable {
	private static final long serialVersionUID = 1L;

	@EmbeddedId
	private ContactRelationshipPhonePK id;

	@Column(name = "CNTC_PH_NMBR_TXT")
	private String contactPhoneNumber;

	@Column(name = "PRMY_PH_INDCTR")
	private String contactPrimaryPhoneIndicator;

	@MapsId("contactRelationshipID")
	@ManyToOne
	@JoinColumn(name = "O_CNTC_RLTNSHP_ID", referencedColumnName = "O_CNTC_RLTNSHP_ID", insertable = false, updatable = false)
	private ContactRelationship phoneContactRelationship;

	public ContactRelationshipPhone() {
	}
	// Getters,setters,hashcode,equals
 
-- Child class PK 

@Embeddable
public class ContactRelationshipPhonePK implements Serializable {
	private static final long serialVersionUID = 1L;

	@Column(name = "O_CNTC_RLTNSHP_ID")
	private Integer contactRelationshipID;

	@Column(name = "PH_TYP_CD")
	private String phoneCode;

	@Column(name = "PH_TYP_TXT")
	private String phoneText;

	public ContactRelationshipPhonePK() {
	}	
 // Getters,setters,hashcode,equals

Exception in thread "main" <openjpa-2.2.3-SNAPSHOT-r422266:1715851 fatal store error> org.apache.openjpa.persistence.RollbackException: The transaction has been rolled back.  See the nested exceptions for details on the errors that occurred.
FailedObject: com.principal.scbu.ods.entity.worker.ContactRelationshipPhone@61b061b0
	at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:594)
	at com.test.Test.main(Test.java:73)
Caused by: <openjpa-2.2.3-SNAPSHOT-r422266:1715851 fatal general error> org.apache.openjpa.persistence.PersistenceException: The transaction has been rolled back.  See the nested exceptions for details on the errors that occurred.
FailedObject: com.principal.scbu.ods.entity.worker.ContactRelationshipPhone@61b061b0
	at org.apache.openjpa.kernel.BrokerImpl.newFlushException(BrokerImpl.java:2352)
	at org.apache.openjpa.kernel.BrokerImpl.flush(BrokerImpl.java:2189)
	at org.apache.openjpa.kernel.BrokerImpl.flushSafe(BrokerImpl.java:2087)
	at org.apache.openjpa.kernel.BrokerImpl.beforeCompletion(BrokerImpl.java:2005)
	at org.apache.openjpa.kernel.LocalManagedRuntime.commit(LocalManagedRuntime.java:81)
	at org.apache.openjpa.kernel.BrokerImpl.commit(BrokerImpl.java:1529)
	at org.apache.openjpa.kernel.DelegatingBroker.commit(DelegatingBroker.java:933)
	at org.apache.openjpa.persistence.EntityManagerImpl.commit(EntityManagerImpl.java:570)
	... 1 more
Caused by: <openjpa-2.2.3-SNAPSHOT-r422266:1715851 fatal general error> org.apache.openjpa.persistence.PersistenceException: AN UPDATE, INSERT, OR SET VALUE IS NULL, BUT THE OBJECT COLUMN O_CNTC_RLTNSHP_ID CANNOT CONTAIN NULL VALUES {prepstmnt 1218201756 INSERT INTO XXX.CNTC_RLTNSHP_PH (PH_TYP_CD, PH_TYP_TXT, CNTC_PH_NMBR_TXT, PRMY_PH_INDCTR) VALUES (?, ?, ?, ?) [params=(null) null, (null) null, (String) E, (String) E]} [code=-407, state=23502]SQLCA OUTPUT[Errp=DSNXODM , Errd=12, 0, 0, -1, 0, 0]
AN UPDATE, INSERT, OR SET VALUE IS NULL, BUT THE OBJECT COLUMN O_CNTC_RLTNSHP_ID CANNOT CONTAIN NULL VALUES
THE DESCRIBE STATEMENT DOES NOT SPECIFY A PREPARED STATEMENT
THE EXECUTE STATEMENT DOES NOT IDENTIFY A VALID PREPARED STATEMENT
FailedObject: com.principal.scbu.ods.entity.worker.ContactRelationshipPhone@61b061b0
	at org.apache.openjpa.jdbc.sql.DBDictionary.narrow(DBDictionary.java:4991)
	at org.apache.openjpa.jdbc.sql.DBDictionary.newStoreException(DBDictionary.java:4957)
	at org.apache.openjpa.jdbc.sql.DB2Dictionary.newStoreException(DB2Dictionary.java:571)
	at org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:136)
	at org.apache.openjpa.jdbc.sql.SQLExceptions.getStore(SQLExceptions.java:78)
	at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushAndUpdate(PreparedStatementManagerImpl.java:144)
	at org.apache.openjpa.jdbc.kernel.BatchingPreparedStatementManagerImpl.flushAndUpdate(BatchingPreparedStatementManagerImpl.java:79)
	at com.ibm.ws.persistence.jdbc.kernel.PreparedStatementManagerImpl.flushAndUpdate(PreparedStatementManagerImpl.java:63)
	at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushInternal(PreparedStatementManagerImpl.java:100)
	at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flush(PreparedStatementManagerImpl.java:88)
	at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:550)
	at org.apache.openjpa.jdbc.kernel.ConstraintUpdateManager.flush(ConstraintUpdateManager.java:106)
	at org.apache.openjpa.jdbc.kernel.BatchingConstraintUpdateManager.flush(BatchingConstraintUpdateManager.java:59)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:113)
	at org.apache.openjpa.jdbc.kernel.AbstractUpdateManager.flush(AbstractUpdateManager.java:78)
	at org.apache.openjpa.jdbc.kernel.JDBCStoreManager.flush(JDBCStoreManager.java:732)
	at org.apache.openjpa.kernel.DelegatingStoreManager.flush(DelegatingStoreManager.java:131)
	... 8 more
Caused by: org.apache.openjpa.lib.jdbc.ReportingSQLException: AN UPDATE, INSERT, OR SET VALUE IS NULL, BUT THE OBJECT COLUMN O_CNTC_RLTNSHP_ID CANNOT CONTAIN NULL VALUES {prepstmnt 1218201756 INSERT INTO XXX.CNTC_RLTNSHP_PH (PH_TYP_CD, PH_TYP_TXT, CNTC_PH_NMBR_TXT, PRMY_PH_INDCTR) VALUES (?, ?, ?, ?) [params=(null) null, (null) null, (String) E, (String) E]} [code=-407, state=23502]
	at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.wrap(LoggingConnectionDecorator.java:219)
	at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.wrap(LoggingConnectionDecorator.java:195)
	at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator.access$1000(LoggingConnectionDecorator.java:59)
	at org.apache.openjpa.lib.jdbc.LoggingConnectionDecorator$LoggingConnection$LoggingPreparedStatement.executeUpdate(LoggingConnectionDecorator.java:1134)
	at org.apache.openjpa.lib.jdbc.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:275)
	at org.apache.openjpa.jdbc.kernel.JDBCStoreManager$CancelPreparedStatement.executeUpdate(JDBCStoreManager.java:1792)
	at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.executeUpdate(PreparedStatementManagerImpl.java:268)
	at org.apache.openjpa.jdbc.kernel.PreparedStatementManagerImpl.flushAndUpdate(PreparedStatementManagerImpl.java:119)
	... 19 more

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
	version="2.0">

	<persistence-unit name="jpa-test" transaction-type="RESOURCE_LOCAL">
		<class&gt;com.principal.scbu.ods.entity.worker.ContactRelationship</class&gt;
		<class&gt;com.principal.scbu.ods.entity.worker.ContactRelationshipPhone</class&gt;
		<class&gt;com.principal.scbu.ods.entity.worker.ContactRelationshipPhonePK</class&gt;
	
		<properties>
			<property name="openjpa.ConnectionDriverName" value="com.ibm.db2.jcc.DB2Driver" />
			<property name="openjpa.ConnectionURL"
				value="jdbc:db2://host:port/dbname:retrieveMessagesFromServerOnGetMessage=true;" />
			<property name="openjpa.ConnectionUserName" value="*****" />
			<property name="openjpa.ConnectionPassword" value="*******" />				
			<property name="openjpa.jdbc.Schema" value="XXXX>
			<property name="openjpa.jdbc.DBDictionary" value="db2" />
			<property name="openjpa.TransactionMode" value="local" />
			<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
			<property name="openjpa.Compatibility"
				value="StrictIdentityValues=false,QuotedNumbersInQueries=true" />
			<property name="openjpa.RuntimeUnenhancedClasses" value="0" />
			<property name="openjpa.Log"
				value="DefaultLevel=WARN, Runtime=INFO, Tool=INFO, SQL=TRACE" />
			<property name="openjpa.jdbc.MappingDefaults"
				value="jpa(ForeignKeyDeleteAction=restrict, JoinForeignKeyDeleteAction=restrict)" />
			<property name="openjpa.jdbc.SchemaFactory" value="native(ForeignKeys=true)" />
			<property name="openjpa.ConnectionFactoryProperties" value="PrintParameters=true" />
		</properties>
	</persistence-unit>
</persistence>