error SGT 900000001 when trying to update

Cloud

Moderator
I have (2) psp2000 with firmware 5.50 Prom4. Already edited the text so I can update to a higher firmware. I was able to successfully update one of them but when I tried to update the other psp to 6.20 or any higher CFW or OFW, I get the error SGT 900000001. Has anyone encountered this error before when trying to update your psp? Tried researching on this error but to no avail. I've already reformatted my memory stick and even tried to use 3 different MS but still get the same error code. Another advice was to edit the data.psar and data.psp but I do not know what to edit. I need your help. Thanks in advance.
 
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