diff --git a/prh_rules/wiki.yml b/prh_rules/wiki.yml
index 8be8ded..1f1983a 100644
--- a/prh_rules/wiki.yml
+++ b/prh_rules/wiki.yml
@@ -2217,8 +2217,6 @@ rules:
     pattern:  /(?:([^ム])マスター)|(?:マスター([^.]))/
   - expected: $1マスタ$2
     pattern:  /(?:([^ム])\bMaster)|(?:Master\b([^.]))/
-  - expected: $1マスタ$2
-    pattern:  /(?:([^ム])\bmaster)|(?:master\b([^.]))/
   - expected: マネージャー$1
     pattern:  /マネージャ([^ー])/
   - expected: メンテナー$1