It’s on a separate SSD as you said, right? The easiest thing I’ve found is to physically remove the second SSD when you install. Since Windows overrode the Linux bootloader, you may have to reinstall that as well.
That’s the most foolproof way I’ve found to install a dual boot, dual drive set up. No issues and no conflicts because at time of install, there’s only ever 1 target drive available.
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