diff --git a/app/models/formations.py b/app/models/formations.py
index e2eadf4609..39ad45083b 100644
--- a/app/models/formations.py
+++ b/app/models/formations.py
@@ -63,7 +63,7 @@ class Formation(db.Model):
         "titre complet pour affichage"
         return f"""Formation {self.titre} ({self.acronyme}) [version {self.version}] code {self.formation_code}"""
 
-    def to_dict(self, with_refcomp_attrs=False):
+    def to_dict(self, with_refcomp_attrs=False, with_departement=True):
         """As a dict.
         Si with_refcomp_attrs, ajoute attributs permettant de retrouver le ref. de comp.
         """
@@ -73,7 +73,8 @@ class Formation(db.Model):
             e.pop("referentiel_competence")
         e["code_specialite"] = e["code_specialite"] or ""
         e["commentaire"] = e["commentaire"] or ""
-        e["departement"] = self.departement.to_dict()
+        if with_departement and self.departement:
+            e["departement"] = self.departement.to_dict()
         e["formation_id"] = self.id  # ScoDoc7 backward compat
         if with_refcomp_attrs and self.referentiel_competence:
             e["refcomp_version_orebut"] = self.referentiel_competence.version_orebut
diff --git a/app/scodoc/sco_edit_formation.py b/app/scodoc/sco_edit_formation.py
index 6209a2be44..11c31436c0 100644
--- a/app/scodoc/sco_edit_formation.py
+++ b/app/scodoc/sco_edit_formation.py
@@ -30,6 +30,7 @@
 """
 import flask
 from flask import g, url_for, request
+import sqlalchemy
 
 from app import db
 from app import log
@@ -167,7 +168,9 @@ def formation_edit(formation_id=None, create=False):
         submitlabel = "Modifier les valeurs"
         H = [
             html_sco_header.sco_header(page_title="Modification d'une formation"),
-            """<h2>Modification de la formation %(acronyme)s</h2>""" % initvalues,
+            f"""<h2>Modification de la formation {formation.acronyme}
+                version {formation.version}
+            </h2>""",
         ]
         if is_locked:
             H.append(
@@ -260,15 +263,17 @@ def formation_edit(formation_id=None, create=False):
             "acronyme": tf[2]["acronyme"],
             "titre": tf[2]["titre"],
             "version": version,
+            "dept_id": g.scodoc_dept_id,
         }
-        ndb.quote_dict(args)
-        others = sco_formations.formation_list(args=args)
-        if others and ((len(others) > 1) or others[0]["formation_id"] != formation_id):
+        other_formations: list[Formation] = Formation.query.filter_by(**args).all()
+        if other_formations and (
+            (len(other_formations) > 1) or other_formations[0].id != formation_id
+        ):
             return (
                 "\n".join(H)
                 + tf_error_message(
                     f"""Valeurs incorrectes: il existe déjà <a href="{
-                        url_for('notes.ue_table', scodoc_dept=g.scodoc_dept, formation_id=others[0]["id"])
+                        url_for('notes.ue_table', scodoc_dept=g.scodoc_dept, formation_id=other_formations[0].id)
                     }">une formation</a> avec même titre,
                     acronyme et version.
                     """
@@ -328,11 +333,24 @@ def do_formation_edit(args):
             del args["type_parcours"]
 
     for field in formation.__dict__:
-        if field and field[0] != "_" and field in args:
-            setattr(formation, field, args[field])
+        if field in args:
+            value = args[field].strip() if isinstance(args[field], str) else args[field]
+            if field and field[0] != "_":
+                setattr(formation, field, value)
 
     db.session.add(formation)
-    db.session.commit()
+    try:
+        db.session.commit()
+    except sqlalchemy.exc.IntegrityError as exc:
+        db.session.rollback()
+        raise ScoValueError(
+            "On ne peut pas créer deux formations avec mêmes acronymes, titres et versions !",
+            dest_url=url_for(
+                "notes.formation_edit",
+                scodoc_dept=g.scodoc_dept,
+                formation_id=formation.id,
+            ),
+        ) from exc
     formation.invalidate_cached_sems()
 
 
diff --git a/app/scodoc/sco_formations.py b/app/scodoc/sco_formations.py
index a109cf5e9f..b9a44d3a36 100644
--- a/app/scodoc/sco_formations.py
+++ b/app/scodoc/sco_formations.py
@@ -52,7 +52,6 @@ from app.scodoc import codes_cursus
 from app.scodoc import sco_edit_matiere
 from app.scodoc import sco_edit_module
 from app.scodoc import sco_edit_ue
-from app.scodoc import sco_formations
 from app.scodoc import sco_formsemestre
 from app.scodoc import sco_preferences
 from app.scodoc import sco_tag_module
@@ -93,7 +92,6 @@ def formation_list(formation_id=None, args={}):  ### XXX obsolete, à supprimer
             args = {"formation_id": formation_id}
     cnx = ndb.GetDBConnexion()
     r = _formationEditor.list(cnx, args=args)
-    # log('%d formations found' % len(r))
     return r