SafeTimerTaskjava.lang.RuntimeException: Failed to serialize org.jenkinsci.plugins.workflow.job.WorkflowRun#execution for class org.jenkinsci.plugins.workflow.job.WorkflowRun

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Failed to serialize org.jenkinsci.plugins.workflow.job.WorkflowRun#execution for class org.jenkinsci.plugins.workflow.job.WorkflowRun
java.util.ConcurrentModificationException: 	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)	at java.util.HashMap$EntryIterator.next(HashMap.java:1463)	at java.util.HashMap$EntryIterator.next(HashMap.java:1461)	at com.thoughtworks.xstream.converters.collections.MapConverter.marshal(MapConverter.java:75)	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:88)	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution$ConverterImpl.writeChild(CpsFlowExecution.java:949)	at org.jenkinsci.plugins.workflow.cps.CpsFlowExecution$ConverterImpl.marshal(CpsFlowExecution.java:925)	at hudson.util.XStream2$AssociatedConverterImpl.marshal(XStream2.java:361)	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:84)	at hudson.util.RobustReflectionConverter.marshallField(RobustReflectionConverter.java:224)	at hudson.util.RobustReflectionConverter$2.writeField(RobustReflectionConverter.java:211)	at hudson.util.RobustReflectionConverter$2.visit(RobustReflectionConverter.java:183)	at com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider.visitSerializableFields(PureJavaReflectionProvider.java:138)	at hudson.util.RobustReflectionConverter.doMarshal(RobustReflectionConverter.java:168)	at hudson.util.RobustReflectionConverter.marshal(RobustReflectionConverter.java:109)	at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:69)	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:58)	at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:43)	at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:82)	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37)	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1026)	at com.thoughtworks.xstream.XStream.marshal(XStream.java:1015)	at com.thoughtworks.xstream.XStream.toXML(XStream.java:988)	at hudson.XmlFile.write(XmlFile.java:178)	at hudson.model.Run.save(Run.java:1901)	at org.jenkinsci.plugins.workflow.job.WorkflowRun.copyLogs(WorkflowRun.java:397)	at org.jenkinsci.plugins.workflow.job.WorkflowRun.access$600(WorkflowRun.java:111)	at org.jenkinsci.plugins.workflow.job.WorkflowRun$3.run(WorkflowRun.java:265)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)