No RichText named answer

org.ametys.plugins.repository.metadata.UnknownMetadataException: No RichText named answer
    at org.ametys.plugins.repository.metadata.jcr.JCRCompositeMetadata.getRichText(JCRCompositeMetadata.java:1223)
    at org.ametys.plugins.repository.metadata.jcr.JCRCompositeMetadata.getRichText(JCRCompositeMetadata.java:1203)
    at org.ametys.plugins.repository.metadata.jcr.JCRCompositeMetadata.getRichText(JCRCompositeMetadata.java:51)
    at org.ametys.cms.lucene.MetadataIndexer.indexRichtextMetadata(MetadataIndexer.java:227)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadata(MetadataIndexer.java:154)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadata(MetadataIndexer.java:132)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadataSet(MetadataIndexer.java:106)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadata(MetadataIndexer.java:171)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadata(MetadataIndexer.java:132)
    at org.ametys.cms.lucene.MetadataIndexer.indexMetadataSet(MetadataIndexer.java:106)
    at org.ametys.cms.contenttype.DefaultContentIndexer.indexContentMetadata(DefaultContentIndexer.java:73)
    at org.ametys.cms.contenttype.DefaultContentIndexer.indexContent(DefaultContentIndexer.java:55)
    at org.ametys.web.contenttype.WebContentIndexer.indexContent(WebContentIndexer.java:53)
    at org.ametys.web.lucene.DefaultPageIndexer._indexPageContents(DefaultPageIndexer.java:262)
    at org.ametys.web.lucene.DefaultPageIndexer.index(DefaultPageIndexer.java:163)
    at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.ametys.runtime.plugin.component.PluginsComponentManager$ComponentInvocationHandler.invoke(PluginsComponentManager.java:159)
    at $Proxy5.index(Unknown Source)
    at org.ametys.web.lucene.IndexerHelper.indexPage(IndexerHelper.java:138)
    at org.ametys.web.lucene.IndexerHelper.indexPage(IndexerHelper.java:150)
    at org.ametys.web.lucene.IndexerHelper.indexPage(IndexerHelper.java:150)
    at org.ametys.web.lucene.SitemapIndexer.index(SitemapIndexer.java:119)
    at org.ametys.web.site.BuildLiveAction.act(BuildLiveAction.java:105)
    at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:125)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
    at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.buildPipeline(ConcreteTreeProcessor.java:194)
    at org.apache.cocoon.components.treeprocessor.TreeProcessor.buildPipeline(TreeProcessor.java:267)
    at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:111)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
    at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.buildPipeline(ConcreteTreeProcessor.java:194)
    at org.apache.cocoon.components.treeprocessor.TreeProcessor.buildPipeline(TreeProcessor.java:267)
    at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:111)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
    at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
    at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.buildPipeline(ConcreteTreeProcessor.java:194)
    at org.apache.cocoon.components.treeprocessor.TreeProcessor.buildPipeline(TreeProcessor.java:267)
    at org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:333)
    at org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:215)
    at org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:65)
    at org.apache.excalibur.source.impl.SourceResolverImpl.resolveURI(SourceResolverImpl.java:208)
    at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
    at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
    at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
    at org.ametys.runtime.plugins.core.dispatcher.DispatchGenerator._dispatching(DispatchGenerator.java:125)
    at org.ametys.runtime.plugins.core.dispatcher.DispatchGenerator.generate(DispatchGenerator.java:81)
    at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:579)
    at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:280)
    at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:481)
    at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:144)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
    at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
    at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
    at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)