diff --git a/app/scodoc/notesdb.py b/app/scodoc/notesdb.py
index 99c4ca9cbd..5a53c544ce 100644
--- a/app/scodoc/notesdb.py
+++ b/app/scodoc/notesdb.py
@@ -88,7 +88,15 @@ def SimpleDictFetch(query, args, cursor=None):
     return cursor.dictfetchall()
 
 
-def DBInsertDict(cnx, table, vals, commit=0, convert_empty_to_nulls=1, return_id=True):
+def DBInsertDict(
+    cnx,
+    table,
+    vals,
+    commit=0,
+    convert_empty_to_nulls=1,
+    return_id=True,
+    ignore_conflicts=False,
+):
     """insert into table values in dict 'vals'
     Return: id de l'object créé
     """
@@ -103,13 +111,18 @@ def DBInsertDict(cnx, table, vals, commit=0, convert_empty_to_nulls=1, return_id
     fmt = ",".join(["%%(%s)s" % col for col in cols])
     # print 'insert into %s (%s) values (%s)' % (table,colnames,fmt)
     oid = None
+    if ignore_conflicts:
+        ignore = " ON CONFLICT DO NOTHING"
+    else:
+        ignore = ""
     try:
         if vals:
             cursor.execute(
-                "insert into %s (%s) values (%s)" % (table, colnames, fmt), vals
+                "insert into %s (%s) values (%s)%s" % (table, colnames, fmt, ignore),
+                vals,
             )
         else:
-            cursor.execute("insert into %s default values" % table)
+            cursor.execute("insert into %s default values%s" % (table, ignore))
         if return_id:
             cursor.execute(f"SELECT CURRVAL('{table}_id_seq')")  # id créé
             oid = cursor.fetchone()[0]
@@ -291,6 +304,7 @@ class EditableTable(object):
         fields_creators={},  # { field : [ sql_command_to_create_it ] }
         filter_nulls=True,  # dont allow to set fields to null
         filter_dept=False,  # ajoute selection sur g.scodoc_dept_id
+        insert_ignore_conflicts=False,
     ):
         self.table_name = table_name
         self.id_name = id_name
@@ -311,6 +325,7 @@ class EditableTable(object):
         self.filter_nulls = filter_nulls
         self.filter_dept = filter_dept
         self.sql_default_values = None
+        self.insert_ignore_conflicts = insert_ignore_conflicts
 
     def create(self, cnx, args):
         "create object in table"
@@ -336,6 +351,7 @@ class EditableTable(object):
             vals,
             commit=True,
             return_id=(self.id_name is not None),
+            ignore_conflicts=self.insert_ignore_conflicts,
         )
         return new_id
 
diff --git a/app/scodoc/sco_formsemestre_inscriptions.py b/app/scodoc/sco_formsemestre_inscriptions.py
index 7d42578d21..7f069a6149 100644
--- a/app/scodoc/sco_formsemestre_inscriptions.py
+++ b/app/scodoc/sco_formsemestre_inscriptions.py
@@ -55,6 +55,7 @@ _formsemestre_inscriptionEditor = ndb.EditableTable(
     "formsemestre_inscription_id",
     ("formsemestre_inscription_id", "etudid", "formsemestre_id", "etat", "etape"),
     sortkey="formsemestre_id",
+    insert_ignore_conflicts=True,
 )