diff --git a/_config/legacy.yml b/_config/legacy.yml
new file mode 100644
index 00000000..50a3cc02
--- /dev/null
+++ b/_config/legacy.yml
@@ -0,0 +1,3 @@
+SilverStripe\ORM\DatabaseAdmin:
+  classname_value_remapping:
+    Comment: SilverStripe\Comments\Model\Comment
\ No newline at end of file