diff --git a/src/data/backwardsCompatibility/backwardsCompatibility.js b/src/data/backwardsCompatibility/backwardsCompatibility.js
index 47ccd2b288ed4fa71568bd4d59ca1ca5dc5ac16d..40abd0c6db6bcbee5713a7bd7a9a61e9c6c1d171 100644
--- a/src/data/backwardsCompatibility/backwardsCompatibility.js
+++ b/src/data/backwardsCompatibility/backwardsCompatibility.js
@@ -1821,7 +1821,7 @@ App.Update.human = (actor, slaveType, node=undefined) => {
 	}
 
 	// traitor and boomerang slaves have a `missingParentTag` property, but other slaves shouldn't have it
-	if (key === "missingParentTag" && !["V.boomerangSlave", "V.traitor"].includes(slaveLoc)) {
+	if ("missingParentTag" in actor && !["V.boomerangSlave", "V.traitor"].includes(slaveLoc)) {
 		App.Update.deleteProperties(actor, "missingParentTag");
 	}
 
@@ -1837,11 +1837,14 @@ App.Update.human = (actor, slaveType, node=undefined) => {
 	App.Update.deleteProperties(actor, ["growTime"]);
 
 	// ----------------------------------- automated beyond this point -----------------------------------
-	console.log(`Adding any missing properties to HumanState with ID: ${actor.ID}`);
-	const base = (actor.ID === -1) ? new App.Entity.PlayerState() : new App.Entity.SlaveState();
-	const baseKeys = Object.keys(base);
-	_.merge(base, actor); // (deep) write values that are in actor to base overwritting as needed
-	actor = base; // set actor to base, now actor has any keys that it was missing from base
+	if (slaveType !== "hero") {
+		console.log(`Adding any missing properties to HumanState with ID: ${actor.ID}`);
+		const base = (actor.ID === -1) ? new App.Entity.PlayerState() : new App.Entity.SlaveState();
+		_.merge(base, actor); // (deep) write values that are in actor to base overwritting as needed
+		actor = base; // set actor to base, now actor has any keys that it was missing from base
+	}
+
+	const baseKeys = Object.keys((actor.ID === -1) ? new App.Entity.PlayerState() : new App.Entity.SlaveState());
 
 	console.log(`Checking HumanState with ID '${actor.ID}' for unexpected keys`);
 	Object.keys(actor).forEach((key) => {