fix: asset movement date for backdated asset entry (#23298)

diff --git a/erpnext/assets/doctype/asset/asset.py b/erpnext/assets/doctype/asset/asset.py
index 0bd03a8..9d08d92 100644
--- a/erpnext/assets/doctype/asset/asset.py
+++ b/erpnext/assets/doctype/asset/asset.py
@@ -146,7 +146,7 @@
 			'assets': assets,
 			'purpose': 'Receipt',
 			'company': self.company,
-			'transaction_date': getdate(nowdate()),
+			'transaction_date': getdate(self.purchase_date),
 			'reference_doctype': reference_doctype,
 			'reference_name': reference_docname
 		}).insert()