fix: Initialize interest_paid as zero
diff --git a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
index ed1eed2..a5ed5de 100644
--- a/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
+++ b/erpnext/loan_management/doctype/loan_repayment/loan_repayment.py
@@ -106,6 +106,7 @@
 	def allocate_amounts(self, paid_entries):
 		self.set('repayment_details', [])
 		self.principal_amount_paid = 0
+		interest_paid = 0
 
 		if self.amount_paid - self.penalty_amount > 0 and paid_entries:
 			interest_paid = self.amount_paid - self.penalty_amount