每当我尝试导入模型字段定义时，我都会看到＆＃34; Odoo内部错误＆＃34;用户界面中的消息以及odoo-server.log中的以下条目，有没有人经历过这个？你有解决方法吗？：
2017-08-15 00:15:05,369 8962 INFO eydsys_mysol werkzeug: 187.140.253.132 - - [15/Aug/2017 00:15:05] "POST /web/dataset/call_kw/base_import.import/do HTTP/1.1" 200 - 2017-08-15 00:15:49,050 8962 INFO eydsys_mysol werkzeug: 187.140.253.132 - - [15/Aug/2017 00:15:49] "POST /longpolling/poll HTTP/1.1" 200 - 2017-08-15 00:16:39,368 8962 INFO eydsys_mysol werkzeug: 187.140.253.132 - - [15/Aug/2017 00:16:39] "POST /longpolling/poll HTTP/1.1" 200 - 2017-08-15 00:16:56,299 8962 INFO eydsys_mysol odoo.addons.base_import.models.base_import: importing 1 rows...
2017-08-15 00:16:56,741 8962 INFO eydsys_mysol odoo.sql_db: bad query: RELEASE SAVEPOINT model_load_save 2017-08-15 00:16:56,742 8962 INFO eydsys_mysol odoo.sql_db: bad query: ROLLBACK TO SAVEPOINT model_load_save 2017-08-15 00:16:56,742 8962 ERROR eydsys_mysol odoo.http: Exception during JSON request handling.
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 638, in _handle_exception
return super(JsonRequest, self)._handle_exception(exception)
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 675, in dispatch
result = self._call_function(**self.params)
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 331, in _call_function
return checked_call(self.db, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/service/model.py", line 119, in wrapper
return f(dbname, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 324, in checked_call
result = self.endpoint(*a, **kw)
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 933, in __call__
return self.method(*args, **kw)
File "/usr/lib/python2.7/dist-packages/odoo/http.py", line 504, in response_wrap
response = f(*args, **kw)
File "/usr/lib/python2.7/dist-packages/odoo/addons/web/controllers/main.py", line 878, in call_kw
return self._call_kw(model, method, args, kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/addons/web/controllers/main.py", line 870, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/api.py", line 681, in call_kw
return call_kw_multi(method, model, args, kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/api.py", line 672, in call_kw_multi
result = method(recs, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/addons/base_import/models/base_import.py", line 667, in do
import_result = self.env[self.res_model].with_context(import_file=True).load(import_fields, data)
File "/usr/lib/python2.7/dist-packages/odoo/models.py", line 887, in load
cr.execute('ROLLBACK TO SAVEPOINT model_load_save')
File "/usr/lib/python2.7/dist-packages/odoo/sql_db.py", line 141, in wrapper
return f(self, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/odoo/sql_db.py", line 218, in execute
res = self._obj.execute(query, params)
InternalError: no such savepoint