Error with OSM nodes (France, Nord Pas de Calais)

I merged the OSM files of Belgium, Zeeland (Netherlands) and Nord Pas de Calais (France). When I started importing Belgium and the Zeeland part of the Netherlands the graph-creating went well. When I added Nord Pas de Calais (and now the whole of France) I’m getting an error with OSM nodes that are duplicates?

Caused by: java.lang.IllegalStateException: Unknown node type: -428454, or coordinates already set. Possibly duplicate OSM node ID: 268180075
        at com.graphhopper.reader.osm.OSMNodeData.addCoordinatesIfMapped(
        at com.graphhopper.reader.osm.WaySegmentParser$Pass2Handler.handleNode(
        at com.graphhopper.reader.osm.WaySegmentParser$ReaderElementHandler.handleElement(
        at com.graphhopper.reader.osm.WaySegmentParser.readOSM(

Did you check if your merged OSM file uses duplicate OSM node ids?

I think the problem occured because I used data from different dates. When I redownload the three files than merge the files it works!

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