diff --git a/linkedgeodata-core/src/main/resources/org/aksw/linkedgeodata/sql/LinkedGeoData3 Physical Schema.sql b/linkedgeodata-core/src/main/resources/org/aksw/linkedgeodata/sql/LinkedGeoData3 Physical Schema.sql
index 3e6fbf4..d500967 100644
--- a/linkedgeodata-core/src/main/resources/org/aksw/linkedgeodata/sql/LinkedGeoData3 Physical Schema.sql	
+++ b/linkedgeodata-core/src/main/resources/org/aksw/linkedgeodata/sql/LinkedGeoData3 Physical Schema.sql	
@@ -221,4 +221,4 @@ CREATE TABLE lgd_relation_geoms(
 ;
 
 SELECT AddGeometryColumn('lgd_relation_geoms', 'geom', 4326, 'GEOMETRY', 2);
-CREATE INDEX idx_simple_polys_polygon ON simple_polys USING GIST(polygon);
+CREATE INDEX idx_lgd_relation_geoms_geom ON lgd_relation_geoms USING GIST(geom);
diff --git a/linkedgeodata-jocelynj-osm-polygons-generation/postal-codes.sql b/linkedgeodata-jocelynj-osm-polygons-generation/postal-codes.sql
index 5017f32..40176d3 100644
--- a/linkedgeodata-jocelynj-osm-polygons-generation/postal-codes.sql
+++ b/linkedgeodata-jocelynj-osm-polygons-generation/postal-codes.sql
@@ -8,6 +8,7 @@ INSERT INTO lgd_relation_geoms
     SELECT a.relation_id, lgd_try_create_polygon(a.relation_id)
     FROM (
         SELECT DISTINCT b.relation_id FROM relation_tags b WHERE b.k='postal_code'
+        AND b.relation_id = 1301659
     ) a
     WHERE lgd_try_create_polygon(a.relation_id) IS NOT NULL
         AND a.relation_id NOT IN (SELECT c.relation_id FROM lgd_relation_geoms c)