diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index 8c05f3228d3..2355eba348f 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -483,8 +483,10 @@ class Project(models.Model):
     @api.model
     def _send_rating_all(self):
         projects = self.search([('rating_status', '=', 'periodic'), ('rating_request_deadline', '<=', fields.Datetime.now())])
-        projects.mapped('task_ids')._send_task_rating_mail()
-        projects._compute_rating_request_deadline()
+        for project in projects:
+            project.task_ids._send_task_rating_mail()
+            project._compute_rating_request_deadline()
+            self.env.cr.commit()
 
 
 class Task(models.Model):