MMBase

original bugid: #6485
It can be nice to define otype in object.xml, e.g. like this:

    <field>
      <descriptions>
        <description xml:lang="en">
          The type of an object.
        </description>
      </descriptions>
      <gui>
        <guiname xml:lang="en">Object type</guiname>
        <guiname xml:lang="nl">Object-type</guiname>
        <guiname xml:lang="eo">Objecttipo</guiname>
        <guitype>typedef</guitype>
      </gui>
      <editor>
        <positions>
          <input>-1</input>
          <list>-1</list>
          <search>102</search>
        </positions>
      </editor>
      <db>
        <name>otype</name>
        <type state="persistent" notnull="true" key="false">NODE</type>
      </db>
    </field>


But then on deploy of e.g. cloud context security:

17:24:09,270 ERR 12063 kb mmbase.module.tools.MMAdmin error.2378 - Insert of node prefix='',otype=9:'-1',owner=1:'admin',name=1:'mmbaseusers',number=9:'-1' failed. Field 'otype' with type NODE is not allowed
 to have a null value. The referenced node is not found. Try to reorder the nodes so the referenced node is imported before this one.