Monterey partition caught in boot loop and reveals fallacious 14.5 OS model

I’ve a 2019 16′ MacbookPro (i9 with T2 Chip) with DualBoot Monterey (on Principal MacintoshHD Partition) – and Ventura (for DAW compatibility exams) and out of the blue my Monterey partition is caught in a startup loop, conventional strategies as SMC or NVRAM reset didn’t work, and after digging deep I seen it now has a Sonoma Model quantity.

What did I do in the present day:
Simply 4 days in the past I up to date the Monterey partition to the most recent Monterey model (i keep in mind that 3 kernel extensions the place proven as invalid and one needed to be reallowed). Earlier than beginning my work in the present day, began up monterey to my morning coffe, learn newspaper, and so on. after which I restarted from my working monterey into Ventura partition and up to date that partition to the most recent ventura model.

After doing that I attempted to change again to monterey, however my mac obtained caught in an countless startup loop when attempting to get into monterey, nonetheless the ventura partition had no downside in beginning up.

So I went via the standard: reset SMC, reset NVRAM, diagnostic (no error), Secure mode (couldn’t get in), nonetheless a bootup loop for monterey, no downside with ventura partition. I attempted to reinstall Monterey on it is partition through web: Preflight error 21…

I made a Set up media with Monterey installer, tried to reinstall monterey on that partition and obtained message “can’t downgrade”…
Can not downgrade from monterey to monterey?
Then it struck me: I went into select startup media and certainly the monterey partition is marked with a Sonoma Model 14.5 because it’s OS model (not 12.7.5 (21H1222) (Could 13, 2024) because it ought to). It is not even the Ventura model I simply up to date, no Sonoma 14.5
So I went into: System/Library/CoreServices/SystemVersion.plist and certainly it is marked as 14.5 (Change Date of the file is seventh Could 2024)…

This leaves me fully clean…
Does anybody have a touch on if I can edit the file manually? I’ve a time machine backup from approx starting of could. nonetheless I would wish to deliver it up working once more, and for the time being my solely viable selection could be to improve it to sonoma.

How on earth did that occur???

<?xml model="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist model="1.0">
<dict>
    <key>BuildID</key>
    <string>4805124E-0C37-11EF-BC27-82EAA8E0F66E</string>
    <key>ProductBuildVersion</key>
    <string>23F79</string>
    <key>ProductCopyright</key>
    <string>1983-2024 Apple Inc.</string>
    <key>ProductName</key>
    <string>macOS</string>
    <key>ProductUserVisibleVersion</key>
    <string>14.5</string>
    <key>ProductVersion</key>
    <string>14.5</string>
    <key>iOSSupportVersion</key>
    <string>17.5</string>
</dict>
</plist>