Help me!

I have a triple-boot MBP 9,2 and after upgradimg my macOS partition to Sequoia, I can't boot OpenCore without USB.

I tried building OpenCore to my internal disk for numerous times, didn't work.

I tried root patching, didn't work.

I tried copying and pasting OC and System files from the USB stick to the internal disk's EFI folder, didn't work.

Are there any solutions to run OpenCore without wiping the whole drive and clean installing everything?