fix: disbursable amount on currrent security price
diff --git a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.py b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.py
index b73dee2..51bf327 100644
--- a/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.py
+++ b/erpnext/loan_management/doctype/loan_disbursement/loan_disbursement.py
@@ -191,7 +191,9 @@
 
 	for security, qty in pledged_securities.items():
 		after_haircut_percentage = 100 - hair_cut_map.get(security)
-		security_value += (loan_security_price_map.get(security) * qty * after_haircut_percentage) / 100
+		security_value += (
+			loan_security_price_map.get(security, 0) * qty * after_haircut_percentage
+		) / 100
 
 	return security_value