diff --git a/rules/deep_blue_cli/system/104.yml b/rules/deep_blue_cli/system/104.yml
deleted file mode 100644
index 25fce57f..00000000
--- a/rules/deep_blue_cli/system/104.yml
+++ /dev/null
@@ -1,13 +0,0 @@
-title: The System log file was cleared
-description: hogehoge
-author: Yea
-detection:
-    selection:
-        Channel: System
-        EventID: 104
-    # condition: selection
-falsepositives:
-    - unknown
-output: 'System Log Clear¥nThe System log was cleared.'
-creation_date: 2020/11/8
-uodated_date: 2020/11/8