diff --git a/frontend/ui/data/onetime_migration.lua b/frontend/ui/data/onetime_migration.lua
index fa5034f5b..fe82959c2 100644
--- a/frontend/ui/data/onetime_migration.lua
+++ b/frontend/ui/data/onetime_migration.lua
@@ -263,9 +263,9 @@ if last_migration_date < 20210531 then
     end
 end
 
--- 202100629, Moves Duration Format to Date Time settings for other plugins to use, https://github.com/koreader/koreader/pull/7897
-if last_migration_date < 202100629 then
-    logger.info("Performing one-time migration for 202100629")
+-- 20210629, Moves Duration Format to Date Time settings for other plugins to use, https://github.com/koreader/koreader/pull/7897
+if last_migration_date < 20210629 then
+    logger.info("Performing one-time migration for 20210629")
 
     local footer = G_reader_settings:child("footer")
     if footer and footer:has("duration_format") then