Apple Home App says there is an update to Rachio

When i open rachio app, I see my FW is iro3-firmware-hk-14-645
I assume this is most recent ? I don’t think Rachio updates their firmwares anymore as this is over a year old, sadly.

Any idea why Apple Home App is saying there is an update to the Rachio? Got excited for a minute, thinking the product might actually have something new/fixed and still supported…

There was an update to the app (not the firmware in the controller) about 3 weeks ago (4.14.0), 2 weeks ago (4.14.1) and one week ago (4.14.2) The notes for all three 4.14.n updates state Navigation improvements. I didn’t see anything about firmware updates in as far back as I cared to scroll.