Help/Support Cydia Impactor not letting me jailbreak again?

[Vypah 46 9 9.3.2]

So I had a iPod 5th Gen and I jailbroke it (this was when iOS 8 was out) and so I decided to get Cydia Impactor. I used it and I tried to re-jailbreak but the tool wouldn't let me. Any reasons why?

[gone123 1.6k iPad Air]

You upgraded to a non jailbroken iOS version?

[Vypah 46 9 9.3.2]

You upgraded to a non jailbroken iOS version?

No I was on iOS 8.4 and I didn't update.

[gone123 1.6k iPad Air]

No I was on iOS 8.4 and I didn't update.

Did you looked your current iOS version?

[Rook 555.6k iPad Pro (2nd gen) 17.4 Donor]

So I had a iPod 5th Gen and I jailbroke it (this was when iOS 8 was out) and so I decided to get Cydia Impactor. I used it and I tried to re-jailbreak but the tool wouldn't let me. Any reasons why?

Would be helpful if you could elaborate on the "wouldn't let me part" so we can help.