diff --git a/app/scodoc/sco_formsemestre.py b/app/scodoc/sco_formsemestre.py
index 6659109d1..669537330 100644
--- a/app/scodoc/sco_formsemestre.py
+++ b/app/scodoc/sco_formsemestre.py
@@ -241,7 +241,7 @@ def do_formsemestre_create(args, silent=False):
         write_formsemestre_etapes(args)
     if args["responsables"]:
         args["formsemestre_id"] = formsemestre_id
-        write_formsemestre_responsables(args)
+        _write_formsemestre_responsables(args)
 
     # create default partition
     partition_id = sco_groups.partition_create(
@@ -275,7 +275,7 @@ def do_formsemestre_edit(sem, cnx=None, **kw):
 
     _formsemestreEditor.edit(cnx, sem, **kw)
     write_formsemestre_etapes(sem)
-    write_formsemestre_responsables(sem)
+    _write_formsemestre_responsables(sem)
 
     sco_cache.invalidate_formsemestre(
         formsemestre_id=sem["formsemestre_id"]
@@ -296,7 +296,10 @@ def read_formsemestre_responsables(formsemestre_id: int) -> list[int]:  # py3.9+
     return [x["responsable_id"] for x in r]
 
 
-def write_formsemestre_responsables(sem):
+def _write_formsemestre_responsables(sem):  # TODO old, à ré-écrire avec models
+    sem["responsables"] = [
+        uid for uid in sem["responsables"] if (uid is not None) and (uid != -1)
+    ]
     return _write_formsemestre_aux(sem, "responsables", "responsable_id")
 
 
@@ -362,10 +365,11 @@ def read_formsemestre_etapes(formsemestre_id):  # OBSOLETE
     return [ApoEtapeVDI(x["etape_apo"]) for x in r if x["etape_apo"]]
 
 
-def write_formsemestre_etapes(sem):
+def write_formsemestre_etapes(sem):  # TODO old, à ré-écrire avec models
     return _write_formsemestre_aux(sem, "etapes", "etape_apo")
 
 
+# TODO old, à ré-écrire avec models
 def _write_formsemestre_aux(sem, fieldname, valuename):
     """fieldname: 'etapes' ou 'responsables'
     valuename: 'etape_apo' ou 'responsable_id'
diff --git a/sco_version.py b/sco_version.py
index a7cb166cf..00f767542 100644
--- a/sco_version.py
+++ b/sco_version.py
@@ -1,7 +1,7 @@
 # -*- mode: python -*-
 # -*- coding: utf-8 -*-
 
-SCOVERSION = "9.6.932"
+SCOVERSION = "9.6.933"
 
 SCONAME = "ScoDoc"