将solr从4.7升级到5.3后，在其中一个节点（2个solr节点，主/从）重启期间执行查询时，出现以下错误：
org.apache.solr.common.SolrException: Error CREATEing SolrCore 'master_Reseller': Could not create a new core in /hybris/configs/solr/server/solr/./cores/master_Reseller/as another core is already defined there
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:662)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:214)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:194)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:675)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:443)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:210)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:179) org.apache.solr.common.SolrException: Error CREATEing SolrCore 'master_Reseller': Could not create a new core in /hybris/configs/solr/server/solr/./cores/master_Reseller/as another core is already defined there
at org.apache.solr.handler.admin.CoreAdminHandler.handleCreateAction(CoreAdminHandler.java:662)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestInternal(CoreAdminHandler.java:214)
at org.apache.solr.handler.admin.CoreAdminHandler.handleRequestBody(CoreAdminHandler.java:194)
at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:143)
at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:675)
at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:443)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:210)
at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:179)
什么原因导致此错误，该如何解决？
致谢
安迪