Caused by: org.ametys.plugins.repository.AmetysRepositoryException: javax.jcr.nodetype.ConstraintViolationException: Unable to perform operation. Node is protected.
	at org.ametys.plugins.repository.metadata.jcr.JCRCompositeMetadata.getCompositeMetadata(JCRCompositeMetadata.java:1067)
	at org.ametys.cms.repository.DefaultContent._getDCContainer(DefaultContent.java:828)
	at org.ametys.cms.repository.DefaultContent.getDCTitle(DefaultContent.java:436)
	at org.ametys.cms.content.ContentGenerator._saxDublinCoreMetadata(ContentGenerator.java:222)
	at org.ametys.cms.content.ContentGenerator._saxContent(ContentGenerator.java:131)
	at org.ametys.cms.content.ContentGenerator._generateContent(ContentGenerator.java:93)
	at org.ametys.cms.content.ContentGenerator.generate(ContentGenerator.java:77)
	at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:579)
	... 80 more
Caused by: javax.jcr.nodetype.ConstraintViolationException: Unable to perform operation. Node is protected.
	at org.apache.jackrabbit.core.ItemValidator.checkCondition(ItemValidator.java:293)
	at org.apache.jackrabbit.core.ItemValidator.checkModify(ItemValidator.java:267)
	at org.apache.jackrabbit.core.NodeImpl.internalAddChildNode(NodeImpl.java:799)
	at org.apache.jackrabbit.core.NodeImpl.internalAddNode(NodeImpl.java:735)
	at org.apache.jackrabbit.core.NodeImpl.addNodeWithUuid(NodeImpl.java:2200)
	at org.apache.jackrabbit.core.NodeImpl.addNode(NodeImpl.java:2155)
	at org.ametys.plugins.repository.metadata.jcr.JCRCompositeMetadata.getCompositeMetadata(JCRCompositeMetadata.java:1057)
	... 87 more