Blank fields won't allow model to save

Questions
6 
<skuidpage unsavedchangeswarning="yes" personalizationmode="server" showsidebar="true" showheader="true" tabtooverride="Opportunity">
   <models>
      <model id="Opportunity" limit="1" query="true" createrowifnonefound="false" sobject="Opportunity">
         <fields>
            <field id="Name"/>
            <field id="CreatedDate"/>
            <field id="Amount"/>
            <field id="Description"/>
         </fields>
         <conditions>
            <condition type="param" enclosevalueinquotes="true" operator="=" field="Id" value="id"/>
         </conditions>
         <actions/>
      </model>
   </models>
   <components>
      <pagetitle model="Opportunity" uniqueid="sk-3shIqH-72">
         <maintitle>
            <template>{{Name}}</template>
         </maintitle>
         <subtitle>
            <template>{{Model&#46;label}}</template>
         </subtitle>
         <actions>
            <action type="delete"/>
            <action type="clone"/>
            <action type="share"/>
            <action type="savecancel" window="self"/>
         </actions>
      </pagetitle>
      <basicfieldeditor showsavecancel="false" showheader="true" model="Opportunity" mode="read" uniqueid="sk-3shIqH-73">
         <columns>
            <column width="50%">
               <sections>
                  <section title="Basics" collapsible="no">
                     <fields>
                        <field id="Name"/>
                        <field id="Amount"/>
                        <field id="Description"/>
                     </fields>
                  </section>
               </sections>
            </column>
            <column width="50%">
               <sections>
                  <section title="System Info">
                     <fields>
                        <field id="CreatedDate"/>
                     </fields>
                  </section>
               </sections>
            </column>
         </columns>
      </basicfieldeditor>
   </components>
   <resources>
      <labels/>
      <css/>
      <javascript/>
   </resources>
   <styles>
      <styleitem type="background" bgtype="none"/>
   </styles>
</skuidpage>