@DaneelOlivaw200, I think you are misunderstanding what it says: (quoting it)
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Yes, you can downgrade RouterOS, but only until the factory installed version, which you can check with this command:
/system/resource/print
uptime: 4w4d18h21m5s
version: 6.49.6 (stable)
build-time: Apr/07/2022 17:53:31
factory-software: 6.45.9
The factory-software is the oldest version supported by this device.
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The point it is making is that you can install any version from 6.45.9 or higher, but nothing lower than the factory-software, which is 6.45.9 in the example they gave.
So you can downgrade to the version you were previously using directly, no need to go all the way back to the lowest version your device supports, and then upgrade.
If you have not done so already, make a backup and save an export as well.
You may want to watch this youtube video.
MikroTik Tutorial 101 - How to Downgrade your Firmware (but I don't understand the reason for downgrading the bootloader firmware (the routerboard firmware) "upgraded" in the last step of the video, I have never done that, I never use that step unless it is actually going to upgrade the firmware). The official docs don't instruct you to do that part when downgrading RouterOS)
You don't specify what device you have. If your device has enough flash storage, you can make a backup of your running partition to another, so it makes it possible to revert more easily. See
Partitions