diff --git a/migrations/000.629.sql b/migrations/000.629.sql
new file mode 100644
index 0000000..5e7f34c
--- /dev/null
+++ b/migrations/000.629.sql
@@ -0,0 +1,15 @@
+-- Add missing sequence for categories_v2_lft_rgt.id to support auto-increment on insert.
+-- This is required by the method we use to insert new category nodes in pw_category_tree.php->insertNode()
+
+CREATE SEQUENCE IF NOT EXISTS categories_v2_lft_rgt_id_seq
+    AS bigint
+    START WITH 1
+    INCREMENT BY 1
+    CACHE 1;
+
+SELECT setval('categories_v2_lft_rgt_id_seq', COALESCE((SELECT MAX(id) FROM categories_v2_lft_rgt), 0) + 1, false);
+
+ALTER TABLE categories_v2_lft_rgt
+    ALTER COLUMN id SET DEFAULT nextval('categories_v2_lft_rgt_id_seq'::regclass);
+
+ALTER SEQUENCE categories_v2_lft_rgt_id_seq OWNED BY categories_v2_lft_rgt.id;