Exception when copying page

java.lang.NullPointerException
 at com.atlassian.confluence.pages.actions.AbstractCreatePageAction.transferDraftAttachments(AbstractCreatePageAction.java:175)
 at com.atlassian.confluence.pages.actions.AbstractCreatePageAction.doAdd(AbstractCreatePageAction.java:136)
 at com.atlassian.confluence.pages.actions.CopyPageAction.doAdd(CopyPageAction.java:58)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:585)
 at com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:302)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:170)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.intercept(DefaultWorkflowInterceptor.java:55)
 at com.atlassian.confluence.core.ConfluenceWorkflowInterceptor.intercept(ConfluenceWorkflowInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.security.interceptors.CaptchaInterceptor.intercept(CaptchaInterceptor.java:46)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.util.LoggingContextInterceptor.intercept(LoggingContextInterceptor.java:48)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.core.CancellingInterceptor.intercept(CancellingInterceptor.java:23)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.security.actions.PermissionCheckInterceptor.intercept(PermissionCheckInterceptor.java:54)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.pages.actions.CommentAwareInterceptor.intercept(CommentAwareInterceptor.java:43)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.pages.actions.PageAwareInterceptor.intercept(PageAwareInterceptor.java:135)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.spaces.actions.SpaceAwareInterceptor.intercept(SpaceAwareInterceptor.java:73)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.core.actions.LastModifiedInterceptor.intercept(LastModifiedInterceptor.java:39)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.confluence.core.ConfluenceAutowireInterceptor.intercept(ConfluenceAutowireInterceptor.java:38)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.atlassian.xwork.interceptors.TransactionalInvocation.invokeAndHandleExceptions(TransactionalInvocation.java:72)
 at com.atlassian.xwork.interceptors.TransactionalInvocation.invokeInTransaction(TransactionalInvocation.java:59)
 at com.atlassian.xwork.interceptors.XWorkTransactionInterceptor.intercept(XWorkTransactionInterceptor.java:56)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
 at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
 at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:115)
 at com.atlassian.confluence.servlet.ConfluenceServletDispatcher.serviceAction(ConfluenceServletDispatcher.java:53)
 at com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:199)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
 at com.atlassian.confluence.util.profiling.ProfilingPageFilter.parsePage(ProfilingPageFilter.java:153)
 at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:54)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.jmx.JmxFilter.doFilter(JmxFilter.java:109)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.core.filters.ServletContextThreadLocalFilter.doFilter(ServletContextThreadLocalFilter.java:21)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.util.LoggingContextFilter.doFilter(LoggingContextFilter.java:54)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.util.UserThreadLocalFilter.doFilter(UserThreadLocalFilter.java:44)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:192)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:120)
 at com.atlassian.confluence.util.AbstractBootstrapHotSwappingFilter.doFilter(AbstractBootstrapHotSwappingFilter.java:28)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:125)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.util.ClusterHeaderFilter.doFilter(ClusterHeaderFilter.java:35)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)
 at com.atlassian.spring.filter.FlushingSpringSessionInViewFilter.doFilterInternal(FlushingSpringSessionInViewFilter.java:29)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:142)
 at com.atlassian.core.filters.ProfilingAndErrorFilter.doFilter(ProfilingAndErrorFilter.java:27)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.core.datetime.RequestTimeThreadLocalFilter.doFilter(RequestTimeThreadLocalFilter.java:34)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:25)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.gzipfilter.GzipFilter.doFilterInternal(GzipFilter.java:88)
 at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:64)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:33)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
 at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:200)
 at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:283)
 at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:773)
 at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
 at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:895)
 at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
 at java.lang.Thread.run(Thread.java:595)