diff --git a/zh_CN.po b/zh_CN.po
index bcc3e2e..b5a86a8 100644
--- a/zh_CN.po
+++ b/zh_CN.po
@@ -330,7 +330,7 @@ msgstr "复制"
 msgid "No network connection detected."
 msgstr "未检测到网络连接。"
 
-#: dialect/preferences.py:251 dialect/preferences.py:250
+#: dialect/preferences.py:251
 #, python-brace-format
 msgid "Not a valid {backend} instance"
 msgstr "不是一个有效的 {backend} 实例"