Python Django populate() isn't reentrant
<p>I've had a program that has been running fine for months.  I've been trying to install Postfix on the server this morning and suddenly start getting an error on the site.  Here is the traceback</p>

<pre><code>mod_wsgi (pid=11948): Target WSGI script '/var/www/zouzoukos/zouzoukos/wsgi.py$
mod_wsgi (pid=11948): Exception occurred processing '/var/www/zouzoukos/zouzoukos/wsgi.py'.
Traceback (most recent call last):
   File "/var/www/zouzoukos/zouzoukos/wsgi.py", line 29, in &lt;module&gt;
     application = get_wsgi_application()
   File "/var/www/zouzoukos/env/lib/python2.7/site-packages/django/core/wsgi.py", line 13, in get_wsgi_application
     django.setup()
   File "/var/www/zouzoukos/env/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
     apps.populate(settings.INSTALLED_APPS)
"/var/www/zouzoukos/env/lib/python2.7/site-packages/django/__init__.py", line 18, in setup
raise RuntimeError("populate() isn't reentrant")
RuntimeError: populate() isn't reentrant
</code></pre>

<p>The thing is, I have a couple more versions of the site running for other people and they're still fine (this was the first).  I cannot understand what I need to update to get it working again.</p>

<p>I've tried everything in <a href="https://stackoverflow.com/questions/30954398/django-populate-isnt-reentrant">this thread</a> and still nothing</p>