diff --git a/mdb/sql/skill.sql b/mdb/sql/skill.sql
index d372e60..2e704ae 100644
--- a/mdb/sql/skill.sql
+++ b/mdb/sql/skill.sql
@@ -6,7 +6,7 @@ WITH skill_names AS (
 	FROM text_data n
 		JOIN text_data d ON n."index" = d."index" AND n."category" = 47 AND d."category" = 48
 ), skill_groups AS (
-	SELECT
+	SELECT DISTINCT
 		group_id,
 		name
 	FROM skill_data d