Update project.py
diff --git a/erpnext/projects/doctype/project/project.py b/erpnext/projects/doctype/project/project.py
index 148b701..a66fac3 100644
--- a/erpnext/projects/doctype/project/project.py
+++ b/erpnext/projects/doctype/project/project.py
@@ -514,6 +514,7 @@
data = frappe.db.sql(""" SELECT name from `tabProject Update`
WHERE project = %s and date = %s """, (project, today()))
+ # len(data) > 1 condition is checked for twicely frequency
if data and (frequency in ['Daily', 'Weekly'] or len(data) > 1):
return False