java.util.ConcurrentModificationException when using wizards in a REST service

Server Error</pre></p><h3>Caused by:</h3><pre>java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
	at java.util.HashMap$KeyIterator.next(HashMap.java:1453)
	at org.jboss.forge.addon.resource.ResourceFactoryImpl.create(ResourceFactoryImpl.java:45)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor$1.call(ClassLoaderInterceptor.java:87)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor.invoke(ClassLoaderInterceptor.java:103)
	at org.jboss.forge.addon.resource.ResourceFactoryImpl_$$_javassist_5a8210ff-9dbe-4b25-be73-1e4d730d8ab2.create(ResourceFactoryImpl_$$_javassist_5a8210ff-9dbe-4b25-be73-1e4d730d8ab2.java)
	at org.jboss.forge.addon.projects.ui.NewProjectWizardImpl.configureTargetLocationInput(NewProjectWizardImpl.java:144)
	at org.jboss.forge.addon.projects.ui.NewProjectWizardImpl.initializeUI(NewProjectWizardImpl.java:91)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor$1.call(ClassLoaderInterceptor.java:87)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderInterceptor.invoke(ClassLoaderInterceptor.java:103)
	at org.jboss.forge.addon.projects.ui.NewProjectWizardImpl_$$_javassist_76bb4ebc-c6c6-4304-9eda-238bba180472.initializeUI(NewProjectWizardImpl_$$_javassist_76bb4ebc-c6c6-4304-9eda-238bba180472.java)
	at org.jboss.forge.addon.ui.impl.controller.SingleCommandControllerImpl.initialize(SingleCommandControllerImpl.java:62)
	at org.jboss.forge.addon.ui.impl.controller.WizardCommandControllerImpl.initialize(WizardCommandControllerImpl.java:122)
	at org.jboss.forge.addon.ui.impl.controller.NoUIWizardControllerDecorator.initialize(NoUIWizardControllerDecorator.java:42)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback$2.call(ClassLoaderAdapterCallback.java:124)
	at org.jboss.forge.furnace.util.ClassLoaders.executeIn(ClassLoaders.java:42)
	at org.jboss.forge.furnace.proxy.ClassLoaderAdapterCallback.invoke(ClassLoaderAdapterCallback.java:97)
	at org.jboss.forge.addon.ui.controller.CommandController_$$_javassist_3bcd5a22-6109-4013-941f-368413182d2d.initialize(CommandController_$$_javassist_3bcd5a22-6109-4013-941f-368413182d2d.java)
	at io.fabric8.forge.rest.CommandsResource.createController(CommandsResource.java:554)