diff --git a/migrations/versions/838081950f27_.py b/migrations/versions/838081950f27_.py
index f30d547..b8e5db0 100644
--- a/migrations/versions/838081950f27_.py
+++ b/migrations/versions/838081950f27_.py
@@ -17,14 +17,14 @@ depends_on = None
 
 
 def upgrade():
-	op.create_check_constraint("mp_name_valid", "meta_package", "name ~* '^[a-z0-9_]+$'")
-
 	op.execute("""
 		DELETE FROM provides AS t USING meta_package AS m WHERE t.metapackage_id = m.id AND NOT (m.name ~* '^[a-z0-9_]+$');
 		DELETE FROM dependency AS t USING meta_package AS m WHERE t.meta_package_id = m.id AND NOT (m.name ~* '^[a-z0-9_]+$');
 		DELETE FROM meta_package WHERE NOT (name ~* '^[a-z0-9_]+$');
 	""")
 
+	op.create_check_constraint("mp_name_valid", "meta_package", "name ~* '^[a-z0-9_]+$'")
+
 
 def downgrade():
 	op.drop_constraint("mp_name_valid", "meta_package", type_="check")