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java.util.ConcurrentModificationException: 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)	at java.util.HashMap$EntryIterator.next(HashMap.java:834)	at java.util.HashMap$EntryIterator.next(HashMap.java:832)	at org.compiere.util.CCache.cleanup(CCache.java:206)	at org.compiere.util.CCache.reset(CCache.java:140)	at org.compiere.util.CacheMgt.reset(CacheMgt.java:113)	at org.compiere.util.Env.reset(Env.java:173)	at org.compiere.util.Env.logout(Env.java:116)	at org.compiere.apps.AEnv.logout(AEnv.java:695)	at org.compiere.apps.AMenu.logout(AMenu.java:545)	at org.compiere.apps.AEnv.actionPerformed(AEnv.java:381)	at org.compiere.apps.AMenu.actionPerformed(AMenu.java:612)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)	at javax.swing.AbstractButton.doClick(AbstractButton.java:357)	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1225)	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1266)	at java.awt.Component.processMouseEvent(Component.java:6134)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)	at java.awt.Component.processEvent(Component.java:5899)	at java.awt.Container.processEvent(Container.java:2023)	at java.awt.Component.dispatchEventImpl(Component.java:4501)	at java.awt.Container.dispatchEventImpl(Container.java:2081)	at java.awt.Component.dispatchEvent(Component.java:4331)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)	at java.awt.Container.dispatchEventImpl(Container.java:2067)	at java.awt.Window.dispatchEventImpl(Window.java:2458)	at java.awt.Component.dispatchEvent(Component.java:4331)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)