diff --git a/erpnext/venue/doctype/booking_credit_type/booking_credit_type.py b/erpnext/venue/doctype/booking_credit_type/booking_credit_type.py
index 62840ce87d14b9433710c140c729ab91a3d77775..65ad370660f0e6fa77b8d99d87caeff9b9c3c53a 100644
--- a/erpnext/venue/doctype/booking_credit_type/booking_credit_type.py
+++ b/erpnext/venue/doctype/booking_credit_type/booking_credit_type.py
@@ -1,9 +1,9 @@
 # Copyright (c) 2023, Dokos SAS and contributors
 # For license information, please see license.txt
 
-import frappe
 from frappe.model.document import Document
 
+
 class BookingCreditType(Document):
 	def validate(self):
 		self.validate_conversions()
@@ -11,7 +11,7 @@ class BookingCreditType(Document):
 	def validate_conversions(self):
 		convertible_items = []
 		for conversion in self.conversion_table:
-			if conversion.item in convertible_items:
+			if (conversion.item, conversion.uom) in convertible_items:
 				self.remove(conversion)
 				continue
-			convertible_items.append(conversion.item)
+			convertible_items.append((conversion.item, conversion.uom))