anchor.diff:                  ((SyncopeClientCompositeErrorException) ex).getExceptions()) {
   
               response.addHeader(
  -                    SyncopeClientErrorHandler.EXCEPTION_TYPE_HEADER,
  -                    sce.getType().getHeaderValue());
  +                    SyncopeClientErrorHandler.EXCEPTION_TYPE_HEADER, sce.getType().getHeaderValue());
   
               for (String attributeName : sce.getElements()) {
  -                response.addHeader(
  -                        sce.getType().getElementHeaderName(),
  -                        attributeName);
  +                response.addHeader(sce.getType().getElementHeaderName(), attributeName);
               }
           }
   
  
positive.code: <%@page import="org.springframework.orm.jpa.JpaSystemException"%>
  <%@page isErrorPage="true" session="false" contentType="application/json" pageEncoding="UTF-8"%>
  <%@page import="org.syncope.types.EntityViolationType"%>
  <%@page import="java.util.Set"%>
  <%@page import="java.util.Map"%>
  
negative.code:                 SyncopeClientErrorHandler.EXCEPTION_TYPE_HEADER,
                  SyncopeClientExceptionType.GenericPersistence.getHeaderValue());
          response.setHeader(
                  SyncopeClientExceptionType.GenericPersistence.getElementHeaderName(),
                  ex.getCause() == null ? ex.getMessage() : ex.getCause().getMessage());
  
          statusCode = HttpServletResponse.SC_BAD_REQUEST;
      } else if (ex instanceof ConfigurationException) {
  