diff --git a/erpnext/buying/doctype/supplier/supplier.json b/erpnext/buying/doctype/supplier/supplier.json
index 9caf3d3fa7c..4a7913bceea 100644
--- a/erpnext/buying/doctype/supplier/supplier.json
+++ b/erpnext/buying/doctype/supplier/supplier.json
@@ -368,19 +368,22 @@
    "fieldname": "supplier_primary_contact",
    "fieldtype": "Link",
    "label": "Supplier Primary Contact",
+   "no_copy": 1,
    "options": "Contact"
   },
   {
    "fetch_from": "supplier_primary_contact.mobile_no",
    "fieldname": "mobile_no",
    "fieldtype": "Read Only",
-   "label": "Mobile No"
+   "label": "Mobile No",
+   "no_copy": 1
   },
   {
    "fetch_from": "supplier_primary_contact.email_id",
    "fieldname": "email_id",
    "fieldtype": "Read Only",
-   "label": "Email Id"
+   "label": "Email Id",
+   "no_copy": 1
   },
   {
    "fieldname": "column_break_44",
@@ -390,6 +393,7 @@
    "fieldname": "primary_address",
    "fieldtype": "Text Editor",
    "label": "Primary Address",
+   "no_copy": 1,
    "read_only": 1
   },
   {
@@ -397,6 +401,7 @@
    "fieldname": "supplier_primary_address",
    "fieldtype": "Link",
    "label": "Supplier Primary Address",
+   "no_copy": 1,
    "options": "Address"
   },
   {
@@ -517,7 +522,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2026-03-09 17:15:25.465759",
+ "modified": "2026-05-29 16:52:59.441272",
  "modified_by": "Administrator",
  "module": "Buying",
  "name": "Supplier",
diff --git a/erpnext/selling/doctype/customer/customer.json b/erpnext/selling/doctype/customer/customer.json
index 95c5fb772e3..3ef461d23bf 100644
--- a/erpnext/selling/doctype/customer/customer.json
+++ b/erpnext/selling/doctype/customer/customer.json
@@ -305,6 +305,7 @@
    "fieldname": "customer_primary_contact",
    "fieldtype": "Link",
    "label": "Customer Primary Contact",
+   "no_copy": 1,
    "options": "Contact"
   },
   {
@@ -312,6 +313,7 @@
    "fieldname": "mobile_no",
    "fieldtype": "Read Only",
    "label": "Mobile No",
+   "no_copy": 1,
    "options": "Mobile"
   },
   {
@@ -319,6 +321,7 @@
    "fieldname": "email_id",
    "fieldtype": "Read Only",
    "label": "Email Id",
+   "no_copy": 1,
    "options": "Email"
   },
   {
@@ -330,12 +333,14 @@
    "fieldname": "customer_primary_address",
    "fieldtype": "Link",
    "label": "Customer Primary Address",
+   "no_copy": 1,
    "options": "Address"
   },
   {
    "fieldname": "primary_address",
    "fieldtype": "Text Editor",
    "label": "Primary Address",
+   "no_copy": 1,
    "read_only": 1
   },
   {
@@ -573,14 +578,16 @@
    "fieldname": "first_name",
    "fieldtype": "Read Only",
    "hidden": 1,
-   "label": "First Name"
+   "label": "First Name",
+   "no_copy": 1
   },
   {
    "fetch_from": "customer_primary_contact.last_name",
    "fieldname": "last_name",
    "fieldtype": "Read Only",
    "hidden": 1,
-   "label": "Last Name"
+   "label": "Last Name",
+   "no_copy": 1
   },
   {
    "description": "Supplier numbers assigned by the customer",
@@ -640,7 +647,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2026-03-09 17:15:26.040050",
+ "modified": "2026-05-29 16:52:59.441272",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Customer",