JT-20712: java.lang.NullPointerException

java.lang.NullPointerException
	at com.jetbrains.teamsys.dnq.database.TransientEntityImpl.getAssociationEndMetaData(TransientEntityImpl.java:248)
	at com.jetbrains.teamsys.dnq.database.TransientEntityImpl.checkCardinality(TransientEntityImpl.java:239)
	at com.jetbrains.teamsys.dnq.database.TransientEntityImpl.createManyToMany(TransientEntityImpl.java:459)
	at com.jetbrains.teamsys.dnq.association.UndirectedAssociationSemantics.createManyToMany(UndirectedAssociationSemantics.java:112)
	at jetbrains.youtrack.links.persistent.IssueLinkPrototypeImpl.link(IssueLinkPrototypeImpl.java:247)
	at jetbrains.charisma.smartui.workspace.Issues_RootHtmlTemplateComponent.setNewIssueVisibility(Issues_RootHtmlTemplateComponent.java:1376)
	at jetbrains.charisma.smartui.workspace.Issues_RootHtmlTemplateComponent$28.invoke(Issues_RootHtmlTemplateComponent.java:1333)
	at jetbrains.charisma.smartui.workspace.Issues_RootHtmlTemplateComponent$28.invoke(Issues_RootHtmlTemplateComponent.java:1331)
	at jetbrains.charisma.smartui.workspace.HeaderNew_HtmlTemplateComponent.newIssueClickInvoke(HeaderNew_HtmlTemplateComponent.java:692)
	at jetbrains.charisma.smartui.workspace.HeaderNew_HtmlTemplateComponent.newIssueAsLinkClick(HeaderNew_HtmlTemplateComponent.java:701)
	at jetbrains.charisma.smartui.workspace.HeaderNew_HtmlTemplateComponent.access$700(HeaderNew_HtmlTemplateComponent.java:62)
	at jetbrains.charisma.smartui.workspace.HeaderNew_HtmlTemplateComponent$4.handle(HeaderNew_HtmlTemplateComponent.java:128)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateComponent.doNewHandleEvent(TemplateComponent.java:609)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateComponent.newHandleByEventHandlers(TemplateComponent.java:589)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateComponent.newHandleByEventHandlers(TemplateComponent.java:587)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateComponent.newHandleByEventHandlers(TemplateComponent.java:587)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateComponent.newHandleEvent(TemplateComponent.java:577)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateActionController.handleEventImpl(TemplateActionController.java:127)
	at jetbrains.mps.webr.runtime.templateComponent.TemplateActionController.handleEvent(TemplateActionController.java:109)
	at jetbrains.mps.webr.runtime.requestProcessor.EventRequestProcessor.processRequest(EventRequestProcessor.java:75)
	at jetbrains.mps.webr.runtime.servlet.MainServlet.processRequest(MainServlet.java:226)
	at jetbrains.mps.webr.runtime.servlet.MainServlet.doGet(MainServlet.java:112)
	at jetbrains.mps.webr.runtime.servlet.MainServlet.doPost(MainServlet.java:190)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:754)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:648)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1336)
	at jetbrains.mps.webr.runtime.filter.QueryParameterFilter.doFilter(QueryParameterFilter.java:25)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
	at org.eclipse.jetty.continuation.ContinuationFilter.doFilter(ContinuationFilter.java:137)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
	at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
	at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:242)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1307)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:559)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:365)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485)
	at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:937)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:998)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:856)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:627)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:51)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Unknown Source)