diff --git a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
index 3d2727d883..310d07f40d 100644
--- a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
@@ -578,6 +578,10 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					if (node.Key.StartsWith("UncloakOn", StringComparison.Ordinal))
 						node.Value.Value = node.Value.Value.Replace("Damage", "Damage, Heal, SelfHeal");
 
+				// Removed dead ActorGroupProxy trait
+				if (engineVersion < 20170318)
+					node.Value.Nodes.RemoveAll(n => n.Key == "ActorGroupProxy");
+
 				UpgradeActorRules(modData, engineVersion, ref node.Value.Nodes, node, depth + 1);
 			}
 
diff --git a/mods/cnc/rules/player.yaml b/mods/cnc/rules/player.yaml
index 1abb134acd..29639a1ae3 100644
--- a/mods/cnc/rules/player.yaml
+++ b/mods/cnc/rules/player.yaml
@@ -9,7 +9,6 @@ Player:
 	PowerManager:
 	AllyRepair:
 	PlayerResources:
-	ActorGroupProxy:
 	DeveloperMode:
 	BaseAttackNotifier:
 	Shroud:
diff --git a/mods/d2k/rules/player.yaml b/mods/d2k/rules/player.yaml
index 3cab2f57e6..3b847d703e 100644
--- a/mods/d2k/rules/player.yaml
+++ b/mods/d2k/rules/player.yaml
@@ -62,7 +62,6 @@ Player:
 	PlayerResources:
 		SelectableCash: 2500, 5000, 7000, 10000, 20000
 		InsufficientFundsNotification: InsufficientFunds
-	ActorGroupProxy:
 	DeveloperMode:
 	BaseAttackNotifier:
 	Shroud:
diff --git a/mods/ra/rules/player.yaml b/mods/ra/rules/player.yaml
index 366cafcc6f..7656176580 100644
--- a/mods/ra/rules/player.yaml
+++ b/mods/ra/rules/player.yaml
@@ -41,7 +41,6 @@ Player:
 	AllyRepair:
 	PlayerResources:
 		InsufficientFundsNotification: InsufficientFunds
-	ActorGroupProxy:
 	DeveloperMode:
 	GpsWatcher:
 	Shroud:
diff --git a/mods/ts/rules/player.yaml b/mods/ts/rules/player.yaml
index 61fa7f4d64..d51bb0a005 100644
--- a/mods/ts/rules/player.yaml
+++ b/mods/ts/rules/player.yaml
@@ -41,7 +41,6 @@ Player:
 	AllyRepair:
 	PlayerResources:
 		InsufficientFundsNotification: InsufficientFunds
-	ActorGroupProxy:
 	DeveloperMode:
 		Enabled: true
 	Shroud: