Unknown entities used in: Overview Warning - old no longer existing entities?

[matticas]

Hi there;

Since upgrading from HA 2026.1.? -> 2026.2.2, HA did some dashboard changes and Spook has this new warning;

Unknown entities used in: Overview
Warning · Reported by Spook

Spook has found a ghost in your dashboards 👻

While floating around, Spook crossed path with the following dashboard:

[Overview](https://[URL]:8123/lovelace/0?edit=1)

This dashboard references the following entities, which are unknown to Home Assistant:

Except, some of these entities I haven't had in years. Lights, automations, sensors, binary sensors, switches, all up about 20 of them.

Originally "Overview" on my system was ui-lovelace.yaml which was my original lovelace I setup for mobile back in the early days of HA. I have kept evolving it over the years and the entities Spook is reporting definitely do not exist in any Dashboards, yaml or UI.

Any idea what is happening with it?

Thanks