Unable to re-add the device after it was first removed

[NickolaosC]

I had this integration installed and working perfectly until recently.

So I removed the device, removed the HACS integration and waited for an update to be made. Today, I added the integration back via HACS and then when I tried to re-add the device I got the error message "unexpected" show up on the UI.

Logger: custom_components.pfsense.config_flow
Source: custom_components/pfsense/config_flow.py:153
Integration: pfSense (documentation, issues)
First occurred: 06:52:50 (2 occurrences)
Last logged: 06:53:36

Unexpected err=AbortFlow('Flow aborted: already_configured'), type(err)=<class 'homeassistant.data_entry_flow.AbortFlow'>

SSL verification is not checked.

I am running Home Assistant using the HAOS method on a RPi 4 with 8Gb RAM

Home Assistant 2023.5.3
Supervisor 2023.04.1
Operating System 10.1
Frontend 20230503.3 - latest

I have not changed IP addresses, account settings (also tried the full admin account), nor upgraded the pFSense firewall recently.

I have noticed that even though I removed the device from HA, there are a number of sensors and other artifacts that have remained behind, including a quite few sensors (i.e. sensor.gandalf_filesystem_used_percentage_slash, sensor.gandalf_gateway_wan_dhcp_status, and update.gandalf_firmware_updates_available to list a few).

Let me know what additional details I can provide to assist with resolving the issue.

Kind regards,

Nickolaos