Merge pull request #52977 from frappe/mergify/bp/version-16-hotfix/pr-52952

fix: customer field made mandatory for sales invoice (backport #52952)

erpnext/accounts/doctype/sales_invoice/sales_invoice.json

@@ -271,6 +271,7 @@
    "oldfieldtype": "Link",
    "options": "Customer",
    "print_hide": 1,
+   "reqd": 1,
    "search_index": 1
   },
   {
@@ -2330,7 +2331,7 @@
    "link_fieldname": "consolidated_invoice"
   }
  ],
- "modified": "2026-02-10 11:59:07.819903",
+ "modified": "2026-02-25 12:41:57.043459",
  "modified_by": "Administrator",
  "module": "Accounts",
  "name": "Sales Invoice",

erpnext/accounts/doctype/sales_invoice/sales_invoice.py

@@ -119,7 +119,7 @@ class SalesInvoice(SellingController):
 		cost_center: DF.Link | None
 		coupon_code: DF.Link | None
 		currency: DF.Link
-		customer: DF.Link | None
+		customer: DF.Link
 		customer_address: DF.Link | None
 		customer_group: DF.Link | None
 		customer_name: DF.SmallText | None