So I downloaded the 6.61 update and when I try to install it it displays this error and I don't have a custom firmware so If anyone know how to solve this
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
Got my PSP GO Today :) it has custom firmware 6.61 : r/PSP
PSP: Infinity 2.0 – Permanent 6.61 Custom Firmware for every PSP! - YouTube