diff --git a/trytond/model/modelsql.py b/trytond/model/modelsql.py
index b4648e94b6..2ebbd93b8c 100644
--- a/trytond/model/modelsql.py
+++ b/trytond/model/modelsql.py
@@ -1196,7 +1196,6 @@ class ModelSQL(ModelStorage):
         cache.setdefault(self._name, {})
         for data in datas:
             for i in data.keys():
-                i = i.strip('"')
                 if i in ('_timestamp', '_datetime'):
                     continue
                 field = self._columns[i]