[fix] comparison with id

models/res_partner.py

@@ -153,7 +153,7 @@ class ScopAlfrescoAdhesionPartner(models.Model):
         """
         errors = ''
         compulsory_docs = self.env['scop.adhesion.file'].search([
-            ('coop_type_id', '=', self.cooperative_form_id),
+            ('coop_type_id', '=', self.cooperative_form_id.id),
             ('is_compulsory', '=', True)
         ])
         loaded_docs = self.env['scop.adhesion.file'].\