How to switch the region of an osm tile-server PROPERLY & how to reset update mechani

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How to switch the region of an osm tile-server PROPERLY & how to reset update mechani

can anyone help me?

Thanks to this switch2osm manual I have been able to set up and run a tile server on my old machine for testing purposes. Up to some weeks ago it served custom mapnik-osm-style tiles for Berlin which I could access through Open Layers and the like.

Then I decided to go one step further by serving another german city instead of Berlin. I've managed to do so, i.e. I can now see the slippy map of the other city, but I've maneuvered the test server into serious trouble on the way because I cannot use the update mechanism any more.

To be more precise, I did the following:

1. Deleted all tiles in /var/lib/mod_tile/default (that was because I did not want to wait for mod_tile to expire and/or delete all tiles -- after all, all of them would be outdated because they showed Berlin and not the new city)
   
   
2. Emptied all the tables in the 'gis' database [planet_osm_nodes, planet_osm_line, planet_osm_point, planet_osm_point, planet_osm_polygon, planet_osm_rels, planet_osm_ways, planet_osm_roads]
   
   
3. Downloaded a regional extract osm.gz2-file from geofabrik and used osmosis to set a bounding box and to load it into the 'gis' database
   
   
4. Touched the planet-import-complete file
   
   
5. Restarted renderd and apache
   
   
6. sudo -u www-data /usr/bin/openstreetmap-tiles-update-expire
   
   

The update-expire script won't finish and throws an error every time try to use it:

<blockquote>
rm: das Entfernen von /var/lib/mod_tile/dirty_tiles.4900 ist nicht m

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