Outdoor Maps+ Delete Prompt Fails

Upon booting my GPSMAP 67i, I receive the prompt "Outdoor Maps+ has been deactivated on this device. Delete all Outdoor Maps+ maps?" with "Yes" and "No" options.

This is fine. I no longer have an active Outdoor Maps+ subscription, and by the time I reactivate it, most if not all of the maps will have updates, so I appreciate the prompt to clear up the storage containing data that is no longer usable.

I select the "Yes" response, and the device displays "Deleting Outdoor Maps" for a little over a minute (about 65 seconds), before returning to the prompt "Outdoor Maps+ has been deactivated on this device. Delete all Outdoor Maps+ maps?" with "Yes" and "No" options. 

As one might guess from the fact that I timed the "Deleting Outdoor Maps" display to last about 65 seconds, I have attempted to run the process several times. If I select "No" it finishes booting up, but will return to the prompt on the next reboot.