diff --git a/migrations/000.493.sql b/migrations/000.493.sql
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index 0000000..8ad69d6
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+++ b/migrations/000.493.sql
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+-- Ensure display_name values are null, and not empty strings.
+-- So that coalesce(display_name, name) logic works as intended.
+-- There are five of these values, for hidden category, the source is a mass import excel.
+UPDATE category_texts SET display_name = null where category_id = 1689 and display_name is not null;