diff --git a/spatial/src/spatial/core/index/rtree/rtree_index_create_physical.cpp b/spatial/src/spatial/core/index/rtree/rtree_index_create_physical.cpp
index d129c406..9b729a61 100644
--- a/spatial/src/spatial/core/index/rtree/rtree_index_create_physical.cpp
+++ b/spatial/src/spatial/core/index/rtree/rtree_index_create_physical.cpp
@@ -285,20 +285,17 @@ static void AddIndexToCatalog(ClientContext &context, CreateRTreeIndexGlobalStat
 
 	// Create the index entry in the catalog
 	auto &schema = table.schema;
-	const auto index_entry = schema.CreateIndex(context, info, table).get();
-	if (!index_entry) {
-		D_ASSERT(info.on_conflict == OnCreateConflict::IGNORE_ON_CONFLICT);
-		// index already exists, but error ignored because of IF NOT EXISTS
-		return;
+
+	if (schema.GetEntry(schema.GetCatalogTransaction(context), CatalogType::INDEX_ENTRY, info.index_name)) {
+		if (info.on_conflict != OnCreateConflict::IGNORE_ON_CONFLICT) {
+			throw CatalogException("Index with name \"%s\" already exists", info.index_name);
+		}
 	}
 
-	// Get the entry as a DuckIndexEntry
+	const auto index_entry = schema.CreateIndex(schema.GetCatalogTransaction(context), info, table).get();
+	D_ASSERT(index_entry);
 	auto &duck_index = index_entry->Cast<DuckIndexEntry>();
 	duck_index.initial_index_size = gstate.rtree->Cast<BoundIndex>().GetInMemorySize();
-	duck_index.info = make_uniq<IndexDataTableInfo>(storage.GetDataTableInfo(), duck_index.name);
-	for (auto &parsed_expr : info.parsed_expressions) {
-		duck_index.parsed_expressions.push_back(parsed_expr->Copy());
-	}
 
 	// Finally add it to storage
 	storage.AddIndex(std::move(gstate.rtree));
diff --git a/test/sql/index/rtree_insert.test b/test/sql/index/rtree_insert.test
index e13962a3..d99f9613 100644
--- a/test/sql/index/rtree_insert.test
+++ b/test/sql/index/rtree_insert.test
@@ -6,9 +6,6 @@ CREATE TABLE t1 (geom GEOMETRY);
 statement ok
 INSERT INTO t1 (geom) VALUES ('POINT(1 1)');
 
-statement ok
-pragma threads=1;
-
 statement ok
 CREATE TABLE points AS SELECT geom::GEOMETRY FROM st_generatepoints({min_x: 0, min_y: 0, max_x: 10000, max_y: 10000}::BOX_2D, 100_000, 1337) as pts(geom);
 
diff --git a/test/sql/index/rtree_projection.test b/test/sql/index/rtree_projection.test
new file mode 100644
index 00000000..b60c922a
--- /dev/null
+++ b/test/sql/index/rtree_projection.test
@@ -0,0 +1,49 @@
+require spatial
+
+statement ok
+CREATE TABLE t1 (id int, geom GEOMETRY);
+
+statement ok
+CREATE OR REPLACE TABLE points AS SELECT row_number() over () as id, geom::GEOMETRY as geom
+FROM st_generatepoints({min_x: 0, min_y: 0, max_x: 10000, max_y: 10000}::BOX_2D, 1000, 1337) as pts(geom);
+
+statement ok
+CREATE INDEX my_idx ON points USING RTREE(geom);
+
+
+# Test different projections
+query II rowsort
+SELECT * FROM points WHERE ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500));
+----
+351	POINT (359.812940005213 406.6655575297773)
+472	POINT (169.11179292947054 129.24372218549252)
+775	POINT (173.61568519845605 455.52933821454644)
+
+query II rowsort
+SELECT geom, id FROM points WHERE ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500));
+----
+POINT (169.11179292947054 129.24372218549252)	472
+POINT (173.61568519845605 455.52933821454644)	775
+POINT (359.812940005213 406.6655575297773)	351
+
+query I rowsort
+SELECT id FROM points WHERE ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500));
+----
+351
+472
+775
+
+query III rowsort
+SELECT id, geom, ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500)) as contained FROM points WHERE ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500));
+----
+351	POINT (359.812940005213 406.6655575297773)	true
+472	POINT (169.11179292947054 129.24372218549252)	true
+775	POINT (173.61568519845605 455.52933821454644)	true
+
+query I rowsort
+SELECT ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500)) as contained FROM points WHERE ST_Intersects(geom, ST_MakeEnvelope(0, 0, 500, 500));
+----
+true
+true
+true
+