I am getting a strange error, while i try to add a component in the placeholder. It shows like "Error: Create operation failed" i migrated from AEM 6.1 to AEM 6.3.
27.07.2018 14:23:40.173 *ERROR* [127.0.0.1 [1532715820162] POST /content/aarpe/en/home/qa/effwer/_jcr_content/everywhere-favorites-content HTTP/1.1] org.apache.sling.servlets.post.impl.operations.ModifyOperation Exception during response processing.
java.lang.UnsupportedOperationException: create 'everywhere-favorites-content' at /content/aarpe/en/home/qa/effwer/jcr:content
at org.apache.sling.resourceresolver.impl.helper.ResourceResolverControl.create(ResourceResolverControl.java:383)
at org.apache.sling.resourceresolver.impl.ResourceResolverImpl.create(ResourceResolverImpl.java:1159)
at org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.deepGetOrCreateNode(AbstractCreateOperation.java:584)
at org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.processCreate(AbstractCreateOperation.java:107)
at org.apache.sling.servlets.post.impl.operations.ModifyOperation.doRun(ModifyOperation.java:91)
at org.apache.sling.servlets.post.AbstractPostOperation.run(AbstractPostOperation.java:97)
at org.apache.sling.servlets.post.impl.SlingPostServlet.doPost(SlingPostServlet.java:205)
at org.apache.sling.api.servlets.SlingAllMethodsServlet.mayService(SlingAllMethodsServlet.java:149)
at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:346)
at org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:378)
at org.apache.sling.engine.impl.request.RequestData.service(RequestData.java:552)
at org.apache.sling.engine.impl.filter.SlingComponentFilterChain.render(SlingComponentFilterChain.java:44)
at org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:77)
at com.day.cq.wcm.core.impl.WCMDebugFilter.doFilter(WCMDebugFilter.java:138)