diff --git a/studies_base/models/study_questionnaire.py b/studies_base/models/study_questionnaire.py
index 4062d53..02bd2e5 100644
--- a/studies_base/models/study_questionnaire.py
+++ b/studies_base/models/study_questionnaire.py
@@ -32,4 +32,8 @@ class StudyQuestionnaire(models.Model):
     copyright_label = fields.Char("Propriétaire et année du copyright")
 
     created = fields.Datetime("Created")
-    date = fields.Datetime("Date")
\ No newline at end of file
+    date = fields.Datetime("Date")
+
+    def copy(self, default=None):
+        default = dict(default or {}, identifier_primary_id=None)
+        return super().copy(default)
\ No newline at end of file
diff --git a/studies_base/models/study_study.py b/studies_base/models/study_study.py
index 3100fbe..405d699 100644
--- a/studies_base/models/study_study.py
+++ b/studies_base/models/study_study.py
@@ -28,7 +28,7 @@ class StudyStudy(models.Model):
     site = fields.Many2one("res.partner", string="Lieu de l'étude")
     identifier_author = fields.Char("ID plateforme")
 
-    identifier_primary_id  = fields.Char("Idientifiant Seintinelles", readonly=True)
+    identifier_primary_id  = fields.Char("Identifiant Seintinelles", readonly=True)
 
     recruitment_target_number = fields.Integer("Nombre de participants à recruter")
     recruitment_max_number = fields.Integer("Nombre limite de participations")
@@ -55,4 +55,8 @@ class StudyStudy(models.Model):
     note = fields.Text("Annotations")
 
     created = fields.Datetime('Created')
-    updated = fields.Datetime('Updated')
\ No newline at end of file
+    updated = fields.Datetime('Updated')
+
+    def copy(self, default=None):
+        default = dict(default or {}, identifier_primary_id=None)
+        return super().copy(default)
\ No newline at end of file