I get this error when querying the DB.

javax.jdo.JDONullIdentityException: The identity must not be null.
        at
javax.jdo.identity.SingleFieldIdentity.assertKeyNotNull(SingleFieldIdentity.java:
97)
        at
javax.jdo.identity.SingleFieldIdentity.setKeyAsObject(SingleFieldIdentity.java:
87)
        at javax.jdo.identity.StringIdentity.(StringIdentity.java:43)
        at guestbook.yttab.jdoNewObjectIdInstance(yttab.java)


I'm able to insert records, but unable to retrieve any.

Has anyone come across this.

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