diff --git a/src/model.ts b/src/model.ts
index 89c7787..38b593f 100644
--- a/src/model.ts
+++ b/src/model.ts
@@ -271,7 +271,7 @@ export class Model<T extends Document> {
     if (!doc) {
       return;
     }
-    const { remainOriginId, populates, projection } = options || {};
+    const { remainOriginId, populates } = options || {};
     this.transferId(doc, remainOriginId);
     const params = this.getPopulateParams();
     if (!params) {