re-flashing stock ROM question


I use LineageOS for 2y now, and I'm wondering if it's possible to flash stock rom again? I am a total noob about this, and I don't want to hard brick the phone.

I grabbed this zip file from Oneplus website:

Is this the whole system or just an update package? Do I also have to flash stock recovery or should I flash this directly with TWRP?

Thank you for your help and explanation.


DON'T PANIC!!!!!!!!!
if you flash the stock rom, it can unroot the phone. i would just flash another custom rom. do you have a custom recovery (Twrp)? hopefully you made a nandroid backup before flashing lineage os. if you did you can easily flash back to stock that way.

i do not have your phone so i have no idea how OnePlus does their firmware updates.