diff --git a/migrations/000.198.sql b/migrations/000.198.sql
index 1a763dc..f3189ad 100644
--- a/migrations/000.198.sql
+++ b/migrations/000.198.sql
@@ -1,5 +1,10 @@
 -- P5-5305: add articles
 
+DROP TABLE IF EXISTS article_article_categories;
+DROP TABLE IF EXISTS article_categories;
+DROP TABLE IF EXISTS article_content;
+DROP TABLE IF EXISTS articles;
+
 CREATE TABLE articles (
     id serial PRIMARY KEY NOT NULL,
     created TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT now(),
@@ -36,7 +41,7 @@ ALTER TABLE article_content
 
 
 CREATE TABLE article_categories (
-    id serial NOT NULL,
+    id serial PRIMARY KEY NOT NULL,
     name TEXT
 );