Reverted to Sierra. Asking me to update to Sequoia. :(

Hi all,

I am prepping my iMac 2017 for sale so I reverted to Sequoia after using OpenCoreLegacyPatcher for the past couple of years. I did it by booting to a Sierra boot thumb drive, erasing my primary disk, and installing Sierra clean.

Now it tells me to install an update to Sequoia. I accidentally agreed at first and the update completed. Once that was done, the machine would not see Wifi due to the needed patch. So I started over and wiped the drive and reinstalled Sierra. But now it wants to update to Sequoia again.

How do I get it to stop doing that? Thank you.