Infrequent exception thrown when inserting new tender or contribuable

[2trc]

ERROR get_armp_entries connection already closed
Traceback (most recent call last):
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 236, in _set_autocommit
self.connection.autocommit = autocommit
psycopg2.InterfaceError: connection already closed

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/opt/katika/tender/management/commands/get_armp_entries.py", line 118, in parse_and_persist
tender.save()
File "/opt/katika/tender/models.py", line 88, in save
super(ArmpEntry, self).save(*args, **kwargs)
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/models/base.py", line 806, in save
force_update=force_update, update_fields=update_fields)
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/models/base.py", line 833, in save_base
with transaction.atomic(using=using, savepoint=False):
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/transaction.py", line 184, in enter
connection.set_autocommit(False, force_begin_transaction_with_broken_autocommit=True)
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/backends/base/base.py", line 411, in set_autocommit
self._set_autocommit(autocommit)
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 236, in _set_autocommit
self.connection.autocommit = autocommit
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/utils.py", line 94, in exit
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/opt/katika/venv/lib/python3.6/site-packages/django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "/opt/katika/venv/lib/python3.6/site-packages/django/db/backends/postgresql/base.py", line 236, in _set_autocommit
self.connection.autocommit = autocommit
django.db.utils.InterfaceError: connection already closed