diff --git a/db/db.code.version.txt b/db/db.code.version.txt
index 037ba97..3d4c7bf 100644
--- a/db/db.code.version.txt
+++ b/db/db.code.version.txt
@@ -1 +1 @@
-219
+220
diff --git a/db/db.update.220.sql b/db/db.update.220.sql
new file mode 100644
index 0000000..13b73f5
--- /dev/null
+++ b/db/db.update.220.sql
@@ -0,0 +1,7 @@
+ALTER TABLE `projectcategories` DROP PRIMARY KEY;
+ALTER TABLE `projectcategories` ADD PRIMARY KEY (`id`, `conferences_id`);
+ALTER TABLE `projectdivisions` DROP PRIMARY KEY;
+ALTER TABLE `projectdivisions` ADD PRIMARY KEY (`id`, `conferences_id`);
+ALTER TABLE `projectsubdivisions` DROP PRIMARY KEY;
+ALTER TABLE `projectsubdivisions` ADD PRIMARY KEY (`id`, `conferences_id`);
+