fix: fetch allocated amount for individual invoice (#19259)

diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index 789bc8a..89aaffb 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -1045,7 +1045,7 @@
 
 	def update_item(source_doc, target_doc, source_parent):
 		target_doc.bank_account = source_parent.party_bank_account
-		target_doc.amount = source_parent.base_paid_amount
+		target_doc.amount = source_doc.allocated_amount
 		target_doc.account = source_parent.paid_to
 		target_doc.payment_entry = source_parent.name
 		target_doc.supplier = source_parent.party