fix: Error while booking deferred revenue
diff --git a/erpnext/accounts/deferred_revenue.py b/erpnext/accounts/deferred_revenue.py
index dd346bc..2f86c6c 100644
--- a/erpnext/accounts/deferred_revenue.py
+++ b/erpnext/accounts/deferred_revenue.py
@@ -263,6 +263,9 @@
 			amount, base_amount = calculate_amount(doc, item, last_gl_entry,
 				total_days, total_booking_days, account_currency)
 
+		if not amount:
+			return
+
 		if via_journal_entry:
 			book_revenue_via_journal_entry(doc, credit_account, debit_account, against, amount,
 				base_amount, end_date, project, account_currency, item.cost_center, item, deferred_process, submit_journal_entry)