diff --git a/tailbone/views/vendors/catalogs.py b/tailbone/views/vendors/catalogs.py
index 6f1c0b35..5f0be4bf 100644
--- a/tailbone/views/vendors/catalogs.py
+++ b/tailbone/views/vendors/catalogs.py
@@ -127,6 +127,8 @@ class VendorCatalogCrud(FileBatchCrud):
             del fs.effective
         else:
             del fs.parser_key
+            fs.vendor.set(readonly=True)
+            fs.effective.set(readonly=True)
 
     def init_batch(self, batch):
         parser = require_catalog_parser(batch.parser_key)