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java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1437)[:1.8.0_101] at java.util.HashMap$KeyIterator.next(HashMap.java:1461)[:1.8.0_101] at org.eclipse.smarthome.binding.lifx.handler.LifxLightHandler$1.run(LifxLightHandler.java:430)[214:org.eclipse.smarthome.binding.lifx:0.9.0.201609192042] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_101] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)[:1.8.0_101] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)[:1.8.0_101] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)[:1.8.0_101] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_101] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_101] at java.lang.Thread.run(Thread.java:745)[:1.8.0_101]