diff --git a/trytond/model/modelstorage.py b/trytond/model/modelstorage.py
index 2126daf08b..1bd687b782 100644
--- a/trytond/model/modelstorage.py
+++ b/trytond/model/modelstorage.py
@@ -1382,6 +1382,9 @@ class ModelStorage(Model):
                 to_write = []
                 for target in targets:
                     if target.id < 0:
+                        if field._type == 'one2many':
+                            # Don't store old target link
+                            setattr(target, field.field, None)
                         to_create.append(target._save_values)
                     else:
                         if target.id in to_remove: