[Q] Can't flash custom ROMs, recovery says my Z2 is a T2. topic

So I've rooted, unlocked the bootloader, and installed dual recovery on my Z2. But when I went to flash a custom ROM it pops up saying "This ROM is for 'Sirius' devices, this is a 'Tianchi'.

I've checked the model number and it's also running the Z2 stock ROM because I needed to downgrade to root it. Anyone ever had this issue?