title: psycopg2.errors.SyntaxError at or near "WITH ORDINALITY" with and PostgreSQL
body: <p>I am trying puplish my django project on Cpanel
  this is my site (<a href="http://qhse-erp.com/" rel="nofollow noreferrer">http://qhse-erp.com/</a>)</p>
  <p>I had used <code>pip install django==2.1 --use-feature=2020-resolver</code></p>
  <p>for install all my package but I got following error:</p>
  <hr />
  <pre><code>move_auto_add... OK
    Applying admin.0003_logentry_add_action_flag_choices... OK
    Applying authtoken.0001_initial... OK
    Applying authtoken.0002_auto_20160226_1747...Traceback (most recent call last):
    File &quot;/home/aeraeg/virtualenv/python/3.7/lib/python3.7/site-packages/django/db/backends/utils.py&quot;, line 84, in _execute
      return self.cursor.execute(sql, params)
  psycopg2.errors.SyntaxError: syntax error at or near &quot;WITH ORDINALITY&quot;
  LINE 6:                     FROM unnest(c.conkey) WITH ORDINALITY co...
                                                    ^
  ................
    File &quot;/home/aeraeg/virtualenv/python/3.7/lib/python3.7/site-packages/django/db/utils.py&quot;, line 89, in __exit__
      raise dj_exc_value.with_traceback(traceback) from exc_value
    File &quot;/home/aeraeg/virtualenv/python/3.7/lib/python3.7/site-packages/django/db/backends/utils.py&quot;, line 84, in _execute
      return self.cursor.execute(sql, params)
  django.db.utils.ProgrammingError: syntax error at or near &quot;WITH ORDINALITY&quot;
  LINE 6:                     FROM unnest(c.conkey) WITH ORDINALITY co...
  </code></pre>
  <p>this is some of my package</p>
  <p>this is list of my package was installed</p>
  <pre><code>Django==2.1
  django-appconf==1.0.3
  django-autocomplete-light==3.4.1
  django-bootstrap-datepicker-plus==3.0.5
  django-bootstrap4==1.0.1
  django-countries==5.5
  django-crispy-forms==1.8.0
  django-cruds-adminlte==0.0.16
  django-image-cropping==1.2.0
  django-modeltranslation==0.13.4
  django-rosetta==0.9.3
  django-settings-export==1.2.1
  django-taggit==1.1.0
  django-userforeignkey==0.3.0
  djangoajax==3.1
  djangorestframework==3.10.3
  Pillow==6.2.1
  pipenv==2018.11.26
  polib==1.1.0
  psycopg2-binary==2.8.4
  pycodestyle==2.5.0
  </code></pre>
  <p>i got error message
  ERROR: easy-thumbnails 2.6 requires django&lt;2,&gt;=1.8, but you'll have django 2.2.6 which is incompatible.
  easy-thumbnails 2.6 requires pillow&lt;4, but you'll have pillow 6.2.1 which is incompatible.</p>
  <p>but i try uninstall django and Pillow by many verson but its not</p>