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java.util.ConcurrentModificationException: 	at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)	at java.util.AbstractList$Itr.next(AbstractList.java:420)	at org.artifactory.security.SecurityServiceImpl.removeAllSecurityData(SecurityServiceImpl.java:548)	at org.artifactory.security.SecurityServiceImpl$$FastClassByCGLIB$$83b96cdb.invoke()	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)	at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:700)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635)	at org.artifactory.security.SecurityServiceImpl$$EnhancerByCGLIB$$ea20e93.removeAllSecurityData()	at org.artifactory.security.SecurityServiceImpl.importFrom(SecurityServiceImpl.java:405)	at org.artifactory.security.SecurityServiceImpl$$FastClassByCGLIB$$83b96cdb.invoke()	at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)	at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:628)	at org.artifactory.security.SecurityServiceImpl$$EnhancerByCGLIB$$ea20e93.importFrom()	at org.artifactory.spring.ArtifactoryApplicationContext.importFrom(ArtifactoryApplicationContext.java:176)	at org.artifactory.webapp.wicket.importexport.system.ImportSystemPanel$1.onSubmit(ImportSystemPanel.java:80)	at org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1355)	at org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:810)	at org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:120)	at org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:163)	at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:293)	at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:100)	at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)	at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1171)	at org.apache.wicket.RequestCycle.step(RequestCycle.java:1248)	at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1349)	at org.apache.wicket.RequestCycle.request(RequestCycle.java:493)	at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:387)	at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:199)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)	at org.artifactory.webapp.servlet.RepoFilter.execute(RepoFilter.java:164)	at org.artifactory.webapp.servlet.RepoFilter.doFilterInternal(RepoFilter.java:93)	at org.artifactory.webapp.servlet.RepoFilter.doFilter(RepoFilter.java:79)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)	at org.artifactory.webapp.servlet.AccessFilter.doFilterInternal(AccessFilter.java:120)	at org.artifactory.webapp.servlet.ArtifactoryFilter.doFilter(ArtifactoryFilter.java:65)	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1088)	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)	at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)	at org.mortbay.jetty.Server.handle(Server.java:324)	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)	at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:450)