[OSM-dev] negative segment id in planet.osm? planet-061205.osm

I think this is not on purpose or is it?
Some examples:
  <way id="3697840" timestamp="2006-10-16T10:08:03+01:00">
    <seg id="-3" />
    <tag k="name" v="Hope St" />
    <tag k="created_by" v="osmeditor2" />
    <tag k="highway" v="unclassified" />
  </way>
  <way id="3697842" timestamp="2006-10-16T10:08:06+01:00">
    <seg id="-4" />
    <tag k="name" v="Circus ST" />
    <tag k="created_by" v="osmeditor2" />
    <tag k="highway" v="unclassified" />
  </way>

-- 
Jörg (Germany, Munich)

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