diff --git a/monkey/monkey_island/cc/services/config_schema/internal.py b/monkey/monkey_island/cc/services/config_schema/internal.py
index 981ccdaab..f90a545ef 100644
--- a/monkey/monkey_island/cc/services/config_schema/internal.py
+++ b/monkey/monkey_island/cc/services/config_schema/internal.py
@@ -8,13 +8,6 @@ INTERNAL = {
             "title": "General",
             "type": "object",
             "properties": {
-                "singleton_mutex_name": {
-                    "title": "Singleton mutex name",
-                    "type": "string",
-                    "default": "{2384ec59-0df8-4ab9-918c-843740924a28}",
-                    "description": "The name of the mutex used to determine whether the monkey is "
-                    "already running",
-                },
                 "keep_tunnel_open_time": {
                     "title": "Keep tunnel open time",
                     "type": "integer",