Error when opening a "Planned Items" tab in intera

I have installed RTC v2.0.
I received an error when I opened some "Planned Items" tab in Iteration Plan.
This error occurred at some iteration plans of some projects.

I was able to see these plans at rtc v1.0.1.1. But I can not see its after migration to RTC v2.0.

Error details
You can not include '<' character in a value of attribute "label " related to element type "folder".

Original:
要素型 "folder"に関連した属性"label"の値には'<'文字を含めてはいけません。
com.ibm.team.repository.common.TeamRepositoryException: 要素型 "folder" に関連した属性 "label" の値には '<' 文字を含めてはいけません。
at com.ibm.team.apt.internal.common.IStore$Factory.createStore(IStore.java:138)
at com.ibm.team.apt.internal.common.IStore$Factory.createStore(IStore.java:113)
at com.ibm.team.apt.internal.client.IterationPlanClient.fetchIterationPlan(IterationPlanClient.java:469)
at com.ibm.team.apt.internal.ide.ui.editor.OutlinePage$5.resolve(OutlinePages.java:985)
at com.ibm.team.apt.internal.ide.ui.editor.OutlinePage$5.resolve(OutlinePages.java:1)
at com.ibm.team.apt.internal.ide.core.util.TeamFuture$DefaultResolver.resolve(TeamFuture.java:39)
at com.ibm.team.apt.internal.ide.core.util.TeamFuture$LoadJob.execute(TeamFuture.java:112)
at com.ibm.team.apt.internal.ide.core.util.TeamFuture$LoadJob.access$0(TeamFuture.java:95)
at com.ibm.team.apt.internal.ide.core.util.TeamFuture$LoadJob$1.run(TeamFuture.java:95)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
at com.ibm.team.apt.internal.ide.core.util.TeamFuture$LoadJob.run(TeamFuture.java:93)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: org.eclipse.core.runtime.CoreException: 要素型 "folder" に関連した属性 "label" の値には '<' 文字を含めてはいけません。
at com.ibm.team.foundation.common.util.XML.Memento.createReadRoot(XMLMemento.java:131)
at com.ibm.team.foundation.common.util.XML.Memento.createReadRoot(XMLMemento.java:76)
at com.ibm.team.apt.internal.common.IStore$Factory.createStore(IStore.java:129)
...11 more
Caused by: org.xml.sax.SAXParseException: 要素型 "folder" に関連した属性 "label" の値には '<' 文字を含めてはいけません。
at org.apache.xerces.parsers.DOMPParser.parser(Unknown Source)
at org.apache.xerces.kaxp.DocumentBuilderImpl.parse(Unknown Source)
at com.ibm.team.foundation.common.util.XMLMemento.createReadRoot(XMLMemento.java:105)
... 13 more