error_item.xml

<items>
  <item>
    <key>error_item</key>
    <name>Error Lump</name>
    <description>
      If you've found this, it means an item was missing in the game files. Please report it!
      [n]As an apology for whatever thing is broken, sell the error lump for a nice price.
    </description>
    <type>loot</type>
    <icon>item2_29</icon>
    <sortKey>_loot20</sortKey>
    <weight>1.0</weight>
    <priceDetails>
      <buy>120</buy>
      <sell>120</sell>
      <canTrade>true</canTrade>
    </priceDetails>
  </item>
</items>