1 files changed, 7 insertions, 2 deletions
diff --git a/src/new_fields/Proxy.ts b/src/new_fields/Proxy.ts
index fd99ae1c0..130ec066e 100644
--- a/src/new_fields/Proxy.ts
+++ b/src/new_fields/Proxy.ts
@@ -3,8 +3,9 @@ import { FieldWaiting } from "./Doc";
 import { primitive, serializable } from "serializr";
 import { observable, action } from "mobx";
 import { DocServer } from "../client/DocServer";
-import { RefField, Id } from "./RefField";
-import { ObjectField, Copy } from "./ObjectField";
+import { RefField } from "./RefField";
+import { ObjectField } from "./ObjectField";
+import { Id, Copy, ToScriptString } from "./FieldSymbols";
 
 @Deserializable("proxy")
 export class ProxyField<T extends RefField> extends ObjectField {
@@ -26,6 +27,10 @@ export class ProxyField<T extends RefField> extends ObjectField {
         return new ProxyField<T>(this.fieldId);
     }
 
+    [ToScriptString]() {
+        return "invalid";
+    }
+
     @serializable(primitive())
     readonly fieldId: string = "";