Seahub.sh problem not starting

Hi guys,
My seafile was working perfectly fine for about 4 months and now suddenly I get this error. I dont know where to look to fix this problem. Can anyone help me?

/srv/seafile# seahub.sh start-fastcgi

Starting seahub (fastcgi) at 127.0.0.1:8000 …
Traceback (most recent call last):
File “/srv/seafile/seahub/manage.py”, line 10, in
execute_from_command_line(sys.argv)
File “/srv/seafile/seahub/thirdpart/django/core/management/init.py”, line 364, in execute_from_command_line
utility.execute()
File “/srv/seafile/seahub/thirdpart/django/core/management/init.py”, line 308, in execute
settings.INSTALLED_APPS
File “/srv/seafile/seahub/thirdpart/django/conf/init.py”, line 56, in getattr
self._setup(name)
File “/srv/seafile/seahub/thirdpart/django/conf/init.py”, line 41, in _setup
self._wrapped = Settings(settings_module)
File “/srv/seafile/seahub/thirdpart/django/conf/init.py”, line 110, in init
mod = importlib.import_module(self.SETTINGS_MODULE)
File “/usr/lib/python2.7/importlib/init.py”, line 37, in import_module
import(name)
File “/srv/seafile/seahub/seahub/init.py”, line 4, in
from handlers import repo_created_cb, repo_deleted_cb, clean_up_repo_trash_cb,
File “/srv/seafile/seahub/seahub/handlers.py”, line 4, in
import settings
File “/srv/seafile/seahub/seahub/settings.py”, line 841, in
import seahub_settings
File “/srv/conf/seahub_settings.py”, line 15, in
DEBUG=true
NameError: name ‘true’ is not defined
Error:Seahub failed to start.

That is where the problem is.

The parameter DEBUG does not seem to be defined in seahub_settings.py: https://download.seafile.com/published/seafile-manual/config/seahub_settings_py.md

It has been defined but false and true have to be written with an upper case first letter.