Updating SVG of exisitng part

You are missing the layer "silkscreen" in you .fzp... Your file reads;

  </schematicView>
  <pcbView>
   <layers image="pcb/srd-05vdc-sl-c_89928e70ece586936e47c224e4f62621_1_pcb.svg">
    <layer layerId="copper0"/>
    <layer layerId="copper1"/>
   </layers>
  </pcbView>
 </views>
 <connectors>

It should read;

   <layers image="pcb/srd-05vdc-sl-c_89928e70ece586936e47c224e4f62621_1_pcb.svg">
    <layer layerId="copper0"/>
    <layer layerId="copper1"/>
    <layer layerId="silkscreen"/>
   </layers>