23:33:15,875 INFO  [DataNucleus.JDO] - Exception thrown
Error in meta-data for acme.server.domain.Task.id: Unsupported primary key type: com.google.appengine.api.datastore.Key
org.datanucleus.store.appengine.MetaDataValidator$DatastoreMetaDataException: Error in meta-data for acme.server.domain.Tasj.id: Unsupported primary key type: com.google.appengine.api.datastore.Key
    at org.datanucleus.store.appengine.MetaDataValidator.validatePrimaryKey(MetaDataValidator.java:442)
    at org.datanucleus.store.appengine.MetaDataValidator.validate(MetaDataValidator.java:120)
    at org.datanucleus.store.appengine.DatastoreManager.validateMetaDataForClass(DatastoreManager.java:818)
    at org.datanucleus.store.appengine.query.DatastoreQuery.performExecute(DatastoreQuery.java:222)
    at org.datanucleus.store.appengine.query.JDOQLQuery.performExecute(JDOQLQuery.java:92)
    at org.datanucleus.store.query.Query.executeQuery(Query.java:1489)
    at org.datanucleus.store.query.Query.executeWithArray(Query.java:1371)
    at org.datanucleus.jdo.JDOQuery.execute(JDOQuery.java:243)
    at com.questdome.emigrateful.server.services.impl.AccountServiceBackendImpl.create(AccountServiceBackendImpl.java:91)