There's no child at index 6 for object page://ce01de2d-5223-493d-a2f5-34023246b5cd
org.ametys.plugins.repository.UnknownAmetysObjectException: There's no child at index 6 for object page://ce01de2d-5223-493d-a2f5-34023246b5cd 
    at org.ametys.plugins.repository.TraversableAmetysObject.getChildAt(TraversableAmetysObject.java:80) 
    at org.ametys.web.repository.page.PageDAO.movePage(PageDAO.java:613) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:483) 
    at org.ametys.core.ui.ExecuteClientCallsAction._executeMethod(ExecuteClientCallsAction.java:133) 
    at org.ametys.core.ui.ExecuteClientCallsAction.act(ExecuteClientCallsAction.java:120) 
    at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:120)