fix: remove item-item group name validation (#28392) (#28399)

(cherry picked from commit 043e3255d6)

Co-authored-by: Rohan <Alchez@users.noreply.github.com>

erpnext/setup/doctype/item_group/item_group.py

@@ -41,7 +41,6 @@ class ItemGroup(NestedSet, WebsiteGenerator):
 	def on_update(self):
 		NestedSet.on_update(self)
 		invalidate_cache_for(self)
-		self.validate_name_with_item()
 		self.validate_one_root()
 		self.delete_child_item_groups_key()
 
@@ -65,10 +64,6 @@ class ItemGroup(NestedSet, WebsiteGenerator):
 		WebsiteGenerator.on_trash(self)
 		self.delete_child_item_groups_key()
 
-	def validate_name_with_item(self):
-		if frappe.db.exists("Item", self.name):
-			frappe.throw(frappe._("An item exists with same name ({0}), please change the item group name or rename the item").format(self.name), frappe.NameError)
-
 	def get_context(self, context):
 		context.show_search = True
 		context.body_class = "product-page"

erpnext/stock/doctype/item/item.py

@@ -131,7 +131,6 @@ class Item(Document):
 
 	def on_update(self):
 		invalidate_cache_for_item(self)
-		self.validate_name_with_item_group()
 		self.update_variants()
 		self.update_item_price()
 		self.update_website_item()
@@ -377,12 +376,6 @@ class Item(Document):
 				where item_code = %s and is_cancelled = 0 limit 1""", self.name))
 		return self._stock_ledger_created
 
-	def validate_name_with_item_group(self):
-		# causes problem with tree build
-		if frappe.db.exists("Item Group", self.name):
-			frappe.throw(
-				_("An Item Group exists with same name, please change the item name or rename the item group"))
-
 	def update_item_price(self):
 		frappe.db.sql("""
 				UPDATE `tabItem Price`