Update asset_value_adjustment.js
diff --git a/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.js b/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.js
index ae4ca33..a6e6974 100644
--- a/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.js
+++ b/erpnext/assets/doctype/asset_value_adjustment/asset_value_adjustment.js
@@ -14,7 +14,9 @@
 		});
 	},
 	onload: function(frm) {
-	frm.trigger("set_current_asset_value");
+		if(frm.is_new() && frm.doc.asset) {
+			frm.trigger("set_current_asset_value");
+		}
 	},
 	asset: function(frm) {
 		frm.trigger("set_current_asset_value");