diff --git a/erpnext/buying/doctype/supplier/supplier.json b/erpnext/buying/doctype/supplier/supplier.json
index b747a64df43..841a3ac780d 100644
--- a/erpnext/buying/doctype/supplier/supplier.json
+++ b/erpnext/buying/doctype/supplier/supplier.json
@@ -110,6 +110,7 @@
    "fieldtype": "Data",
    "in_global_search": 1,
    "label": "Alias",
+   "no_copy": 1,
    "unique": 1
   },
   {
@@ -561,7 +562,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2026-06-22 12:23:09.241125",
+ "modified": "2026-06-27 16:12:33.190257",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Supplier",
diff --git a/erpnext/selling/doctype/customer/customer.json b/erpnext/selling/doctype/customer/customer.json
index 1cc2cde43c7..5556ab927b4 100644
--- a/erpnext/selling/doctype/customer/customer.json
+++ b/erpnext/selling/doctype/customer/customer.json
@@ -130,6 +130,7 @@
    "fieldtype": "Data",
    "in_global_search": 1,
    "label": "Alias",
+   "no_copy": 1,
    "unique": 1
   },
   {
@@ -695,7 +696,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2026-06-22 12:23:19.196991",
+ "modified": "2026-06-27 16:12:10.457900",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Customer",