diff --git a/forwardport/models/project.py b/forwardport/models/project.py
index 53d35b6f..b92e1140 100644
--- a/forwardport/models/project.py
+++ b/forwardport/models/project.py
@@ -210,6 +210,7 @@ class PullRequests(models.Model):
         for pr in self:
             pr.refname = pr.label.split(':', 1)[-1]
 
+    @api.model_create_single
     def create(self, vals):
         # PR opened event always creates a new PR, override so we can precreate PRs
         existing = self.search([