TASK [installer : Set path to PG_VERSION file for given container image] *******
task path: /opt/ansible/roles/installer/tasks/database_configuration.yml:159
fatal: [localhost]: FAILED! => {"msg": "
The conditional check '(_previous_upgraded_pg_version | default(false)) | ternary(_previous_upgraded_pg_version < supported_pg_version, true)' failed. The error was: Unexpected templating type error occurred on ({% if (_previous_upgraded_pg_version | default(false)) | ternary(_previous_upgraded_pg_version < supported_pg_version, true) %} True {% else %} False {% endif %}): '<' not supported between instances of 'AnsibleUnsafeText' and 'int'. '<' not supported between instances of 'AnsibleUnsafeText' and 'int'

The error appears to be in '/opt/ansible/roles/installer/tasks/database_configuration.yml': line 159, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

  block:
    - name: Set path to PG_VERSION file for given container image
      ^ here
"}

PLAY RECAP *********************************************************************
localhost                  : ok=47   changed=0    unreachable=0    failed=1    skipped=23   rescued=0    ignored=0