diff --git a/trytond/model/modelstorage.py b/trytond/model/modelstorage.py
index 40f7d28f75..7f0f72aa93 100644
--- a/trytond/model/modelstorage.py
+++ b/trytond/model/modelstorage.py
@@ -1464,9 +1464,10 @@ class ModelStorage(Model):
         # add datetime_field
         for field in list(ffields.values()):
             if hasattr(field, 'datetime_field') and field.datetime_field:
-                datetime_field = self._fields[field.datetime_field]
-                ffields[field.datetime_field] = datetime_field
                 require_context_field = True
+                if field.datetime_field not in ffields:
+                    datetime_field = self._fields[field.datetime_field]
+                    ffields[field.datetime_field] = datetime_field
 
         # add depends of field with context
         for field in list(ffields.values()):
@@ -1475,9 +1476,9 @@ class ModelStorage(Model):
                 for context_field_name in eval_fields:
                     if context_field_name not in field.depends:
                         continue
-                    context_field = self._fields.get(context_field_name)
                     require_context_field = True
-                    if context_field not in ffields:
+                    if context_field_name not in ffields:
+                        context_field = self._fields.get(context_field_name)
                         ffields[context_field_name] = context_field
 
         def filter_(id_):
@@ -1569,6 +1570,7 @@ class ModelStorage(Model):
             # create browse records for 'remote' models
             for data in read_data:
                 id_ = data['id']
+                to_delete = set()
                 for fname, field in ffields.items():
                     fvalue = data[fname]
                     if field._type in {
@@ -1583,8 +1585,9 @@ class ModelStorage(Model):
                             or field.context
                             or getattr(field, 'datetime_field', None)
                             or isinstance(field, fields.Function)):
-                        del data[fname]
-                self._cache[id_]._update(data)
+                        to_delete.add(fname)
+                self._cache[id_]._update(
+                    **{k: v for k, v in data.items() if k not in to_delete})
         return value
 
     @property