diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 4b1837d..ab49fc0 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -243,7 +243,6 @@
 				(not self.project and not data.sales_invoice) or \
 				(not sales_invoice and data.sales_invoice == self.name):
 				data.sales_invoice = sales_invoice
-				if self.project: return
 
 	def on_update(self):
 		self.set_paid_amount()
@@ -483,13 +482,14 @@
 			self.set('packed_items', [])
 
 	def set_billing_hours_and_amount(self):
-		for timesheet in self.timesheets:
-			ts_doc = frappe.get_doc('Timesheet', timesheet.time_sheet)
-			if not timesheet.billing_hours and ts_doc.total_billable_hours:
-				timesheet.billing_hours = ts_doc.total_billable_hours
+		if not self.project:
+			for timesheet in self.timesheets:
+				ts_doc = frappe.get_doc('Timesheet', timesheet.time_sheet)
+				if not timesheet.billing_hours and ts_doc.total_billable_hours:
+					timesheet.billing_hours = ts_doc.total_billable_hours
 
-			if not timesheet.billing_amount and ts_doc.total_billable_amount:
-				timesheet.billing_amount = ts_doc.total_billable_amount
+				if not timesheet.billing_amount and ts_doc.total_billable_amount:
+					timesheet.billing_amount = ts_doc.total_billable_amount
 
 	def update_timesheet_billing_for_project(self):
 		if not self.timesheets and self.project: