Update item_attribute.py

Error Description Changed
diff --git a/erpnext/stock/doctype/item_attribute/item_attribute.py b/erpnext/stock/doctype/item_attribute/item_attribute.py
index 73fefe4..171e118 100644
--- a/erpnext/stock/doctype/item_attribute/item_attribute.py
+++ b/erpnext/stock/doctype/item_attribute/item_attribute.py
@@ -33,4 +33,4 @@
 		if variant_attributes:
 			for d in variant_attributes:
 				if d[0] not in attribute_values:
-					frappe.throw(_("Attribute Value {0} cannot be removed from {1} as it has Variants.").format(d[0], self.name))
\ No newline at end of file
+					frappe.throw(_("Attribute Value {0} cannot be removed from {1} as Item Variants exist with this Attribute.").format(d[0], self.name))