Hi. I am getting the following error when I try to get data for the parking sensor 'Bank foot metro'

OperationalError at /api/v1/sensor/data/raw.json
FATAL: sorry, too many clients already
Request Method: GET
Request URL: http://uoweb1.ncl.ac.uk/api/v1/sensor/data/raw.json?sensor_name=Bank%20Foot%20Metro%20Bank%20Foot%20Metro&start_time=2017041705756&end_time=20170417100756&api_key=(mykey)
Django Version: 1.8
Exception Type: OperationalError
Exception Value:
FATAL: sorry, too many clients already
FATAL: sorry, too many clients already
Exception Location: /srv/uo_web_portal/venv/lib/python3.4/site-packages/psycopg2/__init__.py in connect, line 164
Python Executable: /usr/bin/python3
Python Version: 3.4.3
Python Path:
['/srv/uo_web_portal/uo_web_portal_django/uowebportal',
'/srv/uo_web_portal/venv/lib/python3.4/site-packages',
'/usr/local/lib/python3.4/dist-packages/greenlet-0.4.10-py3.4-linux-x86_64.egg',
'/usr/local/lib/python3.4/dist-packages/gevent-1.1.1-py3.4-linux-x86_64.egg',
'/usr/local/lib/python3.4/dist-packages/cairocffi-0.7.2-py3.4.egg',
'/home/nnh33/cairocffi-0.7.2/.eggs/cffi-1.6.0-py3.4-linux-x86_64.egg',
'/home/nnh33/cairocffi-0.7.2/.eggs/pycparser-2.14-py3.4.egg',
'/usr/lib/python3.4',
'/usr/lib/python3.4/plat-x86_64-linux-gnu',
'/usr/lib/python3.4/lib-dynload',
'/usr/local/lib/python3.4/dist-packages',
'/usr/lib/python3/dist-packages']
Server time: Mon, 17 Apr 2017 10:22:39 +0100

I've been using the API for a few months now and I never got this issue. Has anything changed in the database infrastructure?

Any help would be much appreciated.

Thanks

Silvia