diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index cb501c1ffbc..ee18410a57b 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -321,9 +321,7 @@ class SalesInvoice(SellingController):
 		self.set_against_income_account()
 		self.validate_time_sheets_are_submitted()
 		self.validate_multiple_billing("Delivery Note", "dn_detail", "amount")
-		if not self.is_return:
-			self.validate_serial_numbers()
-		else:
+		if self.is_return:
 			self.timesheets = []
 		self.update_packing_list()
 		self.set_billing_hours_and_amount()
@@ -1706,6 +1704,7 @@ class SalesInvoice(SellingController):
 		self.set("write_off_amount", reference_doc.get("write_off_amount"))
 		self.due_date = None
 
+<<<<<<< HEAD
 	def validate_serial_numbers(self):
 		"""
 		validate serial number agains Delivery Note and Sales Invoice
@@ -1753,6 +1752,8 @@ class SalesInvoice(SellingController):
 					)
 				)
 
+=======
+>>>>>>> 61efb2bb39 (fix: delivery_document_no column issue)
 	def update_project(self):
 		unique_projects = list(set([d.project for d in self.get("items") if d.project]))
 		if self.project and self.project not in unique_projects:
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
index b7b0873c76b..b96445e2c3a 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
@@ -3,6 +3,13 @@
 
 
 from frappe.model.document import Document
+<<<<<<< HEAD
+=======
+from frappe.utils.data import cint
+
+from erpnext.assets.doctype.asset.depreciation import get_disposal_account_and_cost_center
+from erpnext.stock.doctype.serial_no.serial_no import get_serial_nos
+>>>>>>> 61efb2bb39 (fix: delivery_document_no column issue)
 
 
 class SalesInvoiceItem(Document):
@@ -93,4 +100,35 @@ class SalesInvoiceItem(Document):
 		weight_uom: DF.Link | None
 	# end: auto-generated types
 
+<<<<<<< HEAD
 	pass
+=======
+	def validate_cost_center(self, company: str):
+		cost_center_company = frappe.get_cached_value("Cost Center", self.cost_center, "company")
+		if cost_center_company != company:
+			frappe.throw(
+				_("Row #{0}: Cost Center {1} does not belong to company {2}").format(
+					frappe.bold(self.idx), frappe.bold(self.cost_center), frappe.bold(company)
+				)
+			)
+
+	def set_actual_qty(self):
+		if self.item_code and self.warehouse:
+			self.actual_qty = (
+				frappe.db.get_value(
+					"Bin", {"item_code": self.item_code, "warehouse": self.warehouse}, "actual_qty"
+				)
+				or 0
+			)
+
+	def set_income_account_for_fixed_asset(self, company: str):
+		"""Set income account for fixed asset item based on company's disposal account and cost center."""
+		if not self.is_fixed_asset:
+			return
+
+		disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(company)
+
+		self.income_account = disposal_account
+		if not self.cost_center:
+			self.cost_center = depreciation_cost_center
+>>>>>>> 61efb2bb39 (fix: delivery_document_no column issue)
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 2b4dad137c2..76e5b4ea972 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -12,7 +12,6 @@ from frappe.utils import cint, flt
 
 from erpnext.controllers.accounts_controller import get_taxes_and_charges, merge_taxes
 from erpnext.controllers.selling_controller import SellingController
-from erpnext.stock.doctype.serial_no.serial_no import get_delivery_note_serial_no
 
 form_grid_templates = {"items": "templates/form_grid/item_grid.html"}
 
@@ -980,11 +979,6 @@ def make_sales_invoice(source_name, target_doc=None, args=None):
 	def update_item(source_doc, target_doc, source_parent):
 		target_doc.qty = to_make_invoice_qty_map[source_doc.name]
 
-		if source_doc.serial_no and source_parent.per_billed > 0 and not source_parent.is_return:
-			target_doc.serial_no = get_delivery_note_serial_no(
-				source_doc.item_code, target_doc.qty, source_parent.name
-			)
-
 	def get_pending_qty(item_row):
 		pending_qty = item_row.qty - invoiced_qty_map.get(item_row.name, 0)
 
diff --git a/erpnext/stock/doctype/serial_no/serial_no.py b/erpnext/stock/doctype/serial_no/serial_no.py
index 4c693d8efec..54f96fb7b10 100644
--- a/erpnext/stock/doctype/serial_no/serial_no.py
+++ b/erpnext/stock/doctype/serial_no/serial_no.py
@@ -169,21 +169,6 @@ def update_maintenance_status():
 		frappe.db.set_value("Serial No", doc.name, "maintenance_status", doc.maintenance_status)
 
 
-def get_delivery_note_serial_no(item_code, qty, delivery_note):
-	serial_nos = ""
-	dn_serial_nos = frappe.db.sql_list(
-		f""" select name from `tabSerial No`
-		where item_code = %(item_code)s and delivery_document_no = %(delivery_note)s
-		and sales_invoice is null limit {cint(qty)}""",
-		{"item_code": item_code, "delivery_note": delivery_note},
-	)
-
-	if dn_serial_nos and len(dn_serial_nos) > 0:
-		serial_nos = "\n".join(dn_serial_nos)
-
-	return serial_nos
-
-
 @frappe.whitelist()
 def auto_fetch_serial_number(
 	qty: int,