<p>The extracts provided by Geofabrik are not "referentially complete" - that is, they contain relations with references to members which are not included in the extract. For example, the relation that you mention (2220322) has way 398377196 as a member, but that way is not included in the extract.</p>
<p>The api and website code is not designed to cope with the database being in an inconsistent state - that's why you get the server error.</p>
<p>The way to fix this is to pre-prepare the extract to avoid having any referential integrity problems. I'm not sure off the top of my head if there's a script available for this - suggestions welcome!</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/openstreetmap/openstreetmap-website/issues/1988#issuecomment-419829951">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABWnLT6zBMbaPDT-bI6Uz0qZdVLSwUbOks5uZiJZgaJpZM4Wg3ow">mute the thread</a>.<img src="https://github.com/notifications/beacon/ABWnLf2dB4XnJquwy4DJFmkYeAnPlaQsks5uZiJZgaJpZM4Wg3ow.gif" height="1" width="1" alt="" /></p>
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