ChangelogRescalingITCase.test failed due to IllegalStateException

Apr 01 20:26:53 Caused by: java.lang.IllegalArgumentException: Key group 94 is not in KeyGroupRange{startKeyGroup=96, endKeyGroup=127}. Unless you're directly using low level state access APIs, this is most likely caused by non-deterministic shuffle key (hashCode and equals implementation).
Apr 01 20:26:53 	at org.apache.flink.runtime.state.KeyGroupRangeOffsets.newIllegalKeyGroupException(KeyGroupRangeOffsets.java:37)
Apr 01 20:26:53 	at org.apache.flink.runtime.state.heap.StateTable.getMapForKeyGroup(StateTable.java:305)
Apr 01 20:26:53 	at org.apache.flink.runtime.state.heap.StateTable.get(StateTable.java:261)
Apr 01 20:26:53 	at org.apache.flink.runtime.state.heap.StateTable.get(StateTable.java:143)
Apr 01 20:26:53 	at org.apache.flink.runtime.state.heap.HeapListState.add(HeapListState.java:94)
Apr 01 20:26:53 	at org.apache.flink.state.changelog.ChangelogListState.add(ChangelogListState.java:78)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.operators.windowing.WindowOperator.processElement(WindowOperator.java:404)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.ChainingOutput.pushToOperator(ChainingOutput.java:99)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.ChainingOutput.collect(ChainingOutput.java:80)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.ChainingOutput.collect(ChainingOutput.java:39)
Apr 01 20:26:53 	at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:56)
Apr 01 20:26:53 	at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:29)
Apr 01 20:26:53 	at org.apache.flink.streaming.api.operators.StreamMap.processElement(StreamMap.java:38)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:233)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.processElement(AbstractStreamTaskNetworkInput.java:134)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.io.AbstractStreamTaskNetworkInput.emitNext(AbstractStreamTaskNetworkInput.java:105)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:65)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:531)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:227)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:841)
Apr 01 20:26:53 	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:767)
Apr 01 20:26:53 	at org.apache.flink.runtime.taskmanager.Task.runWithSystemExitMonitoring(Task.java:948)
Apr 01 20:26:53 	at org.apache.flink.runtime.taskmanager.Task.restoreAndInvoke(Task.java:927)
Apr 01 20:26:53 	at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:741)
Apr 01 20:26:53 	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:563)
Apr 01 20:26:53 	at java.lang.Thread.run(Thread.java:748)