com.hybris.datahub.composition.key.IncompleteKeyException:

[#1]

2019-12-12 17:34:59,706 [DEBUG] [c.h.d.c.i.CompositionChainRunnerStrategy] Integration Key generation for canonical item CanonicalItem{status=ERROR, dataPool=DataHubPoolEntity{id=9305, name=SAPORDER_INBOUND_POOL}, fields={invoiceNumber=0050111977, Values=null, Qualifier=null}} failed. com.hybris.datahub.composition.key.IncompleteKeyException: Value for attribute Qualifier of canonical item CanonicalOrderRelationInvoiceNumber is blank or null. at com.hybris.datahub.composition.key.AlphabeticalIntegrationKeyGenerationStrategy.generateKeyValue(AlphabeticalIntegrationKeyGenerationStrategy.java:37) at com.hybris.datahub.composition.key.DefaultIntegrationKeyGenerator.calculateIntegrationKey(DefaultIntegrationKeyGenerator.java:75) at com.hybris.datahub.composition.key.DefaultIntegrationKeyGenerator.calculateIntegrationKey(DefaultIntegrationKeyGenerator.java:56) at com.hybris.datahub.composition.impl.CompositionChainRunnerStrategy.generateIntegrationKeyValue(CompositionChainRunnerStrategy.java:131) at com.hybris.datahub.composition.impl.CompositionChainRunnerStrategy.runChain(CompositionChainRunnerStrategy.java:77) at com.hybris.datahub.akka.actor.grouping.impl.CanonicalItemComposer.compose(CanonicalItemComposer.java:46) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:26) at akka.japi.pf.UnitCaseStatement.apply(CaseStatements.scala:21) at scala.PartialFunction.applyOrElse(PartialFunction.scala:123) at scala.PartialFunction.applyOrElse$(PartialFunction.scala:122) at akka.japi.pf.UnitCaseStatement.applyOrElse(CaseStatements.scala:21) at scala.PartialFunction$OrElse.applyOrElse(PartialFunction.scala:171) at akka.actor.Actor.aroundReceive(Actor.scala:517) at akka.actor.Actor.aroundReceive$(Actor.scala:515) at akka.actor.AbstractActor.aroundReceive(AbstractActor.scala:132) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:527) at akka.actor.ActorCell.invoke(ActorCell.scala:496) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257) at akka.dispatch.Mailbox.run(Mailbox.scala:224) at akka.dispatch.Mailbox.exec(Mailbox.scala:234) at akka.dispatch.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at akka.dispatch.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at akka.dispatch.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at akka.dispatch.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)