Getting 111L back to 111D

I have a reason why, but it’s complicated so I’ll skip for now.
Backtracking from the process to make it an L, I went from 8.29 to 8.19. But when I try to go down to 1.29 it says Target Not Found. Have I missed something or can you not go back?

Pioneer firmware will not allow you to go back so you may be out of luck unless TDB web site has a Pioneer firmware they have hacked. Good luck.

They do. I found it.