If you need to flush the cache when you edit/add/delete a record in your custom table (
the Custom tables module), the cache key is not ‘<custom table class name>|all’, but ‘
customtableitem.<custom table class name>|all’.
You can check the class name of your custom table in the ‘CMS_Class’ table in your Kentico database.
More information about cache dependencies:
Deep dive: Cache dependencies
-hg-