Add forgotten overwrite flag

cache.sh

@@ -40,7 +40,7 @@ if [ -f "$SCRIPT_DIR/osm_data.json" ]; then
     fi
     node "$SCRIPT_DIR/convert_osm.js"
     echo "OSM data converted to GeoJSON at $SCRIPT_DIR/osm_data.geojson"
-    ogr2ogr -f "PostgreSQL" PG:"$PGSQL_URL" "$SCRIPT_DIR/osm_data.geojson" -nln "$LAYER_NAME"
+    ogr2ogr -f "PostgreSQL" PG:"$PGSQL_URL" "$SCRIPT_DIR/osm_data.geojson" -nln "$LAYER_NAME" -overwrite
     echo "OSM data imported into PostgreSQL layer $LAYER_NAME"
 else
     echo "Failed to download OSM data."