OperationalError: no such table: base_commandslastcheck

Hello,
I have some errors in seahub_email_sender.log

[INFO]2016-10-21 03:54:35 PID 10208: 0 emails attempted, 0 sent, 0 failed
Traceback (most recent call last):
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/manage.py”, line 10, in
execute_from_command_line(sys.argv)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/core/management/init.py”, line 354, in execute_from_command_line
utility.execute()
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/core/management/init.py”, line 346, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/core/management/base.py”, line 394, in run_from_argv
self.execute(*args, **cmd_options)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/core/management/base.py”, line 445, in execute
output = self.handle(*args, **options)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/seahub/notifications/management/commands/send_notices.py”, line 39, in handle
self.do_action()
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/seahub/notifications/management/commands/send_notices.py”, line 193, in do_action
cmd_last_check = CommandsLastCheck.objects.get(command_type=self.label)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/manager.py”, line 127, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/query.py”, line 328, in get
num = len(clone)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/query.py”, line 144, in len
self._fetch_all()
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/query.py”, line 965, in _fetch_all
self._result_cache = list(self.iterator())
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/query.py”, line 238, in iterator
results = compiler.execute_sql()
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/models/sql/compiler.py”, line 840, in execute_sql
cursor.execute(sql, params)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/backends/utils.py”, line 64, in execute
return self.cursor.execute(sql, params)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/utils.py”, line 98, in exit
six.reraise(dj_exc_type, dj_exc_value, traceback)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/backends/utils.py”, line 64, in execute
return self.cursor.execute(sql, params)
File “/home/simon/web/easter/seafile-pro-server-6.0.2/seahub/thirdpart/Django-1.8.10-py2.7.egg/django/db/backends/sqlite3/base.py”, line 318, in execute
return Database.Cursor.execute(self, query, params)
django.db.utils.OperationalError: no such table: base_commandslastcheck

Do you know what is the problem ?
I’m using Seafile seafile-pro-server-6.0.2.