Setting servletVersion to 3.1 generate as many <error-page> as entity scaffolds

project-new --named testwebxml

servlet-setup --servletVersion 3.1

jpa-new-entity --named Category ;
jpa-new-field --named name --length 100 ;

scaffold-generate --webRoot /admin --targets org.testwebxml.model.Category

jpa-new-entity --named Publisher ;
jpa-new-field --named name --length 30 ;

scaffold-generate --webRoot /admin --targets org.testwebxml.model.Publisher

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="3.1" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<display-name>module07</display-name>
  <session-config>
  <session-timeout>30</session-timeout>
  </session-config>
  <mime-mapping>
  <extension>ico</extension>
    <mime-type>image/x-icon</mime-type>
  </mime-mapping>
  <error-page>
  <error-code>404</error-code>
    <location>/faces/error.xhtml</location>
  </error-page>
  <error-page>
  <error-code>500</error-code>
    <location>/faces/error.xhtml</location>
  </error-page>
  <context-param>
  <param-name>javax.faces.DATETIMECONVERTER_DEFAULT_TIMEZONE_IS_SYSTEM_TIMEZONE</param-name>
    <param-value>true</param-value>
  </context-param>
  <error-page>
  <error-code>404</error-code>
    <location>/faces/error.xhtml</location>
  </error-page>
  <error-page>
  <error-code>500</error-code>
    <location>/faces/error.xhtml</location>
  </error-page>
</web-app>