problem in repairing oppo a54s

[safari60]

hi every body
i want to repair imei oppo a54s cph 2273
in the end of repair has a error in pactch certificate
phone version is : 11_A.13_2022030912120000
i downgade to version _CPH2273_11_A.01_210612_RFT and imei is gone

 

[GsmDost]

Bl unlock -> Factory reset - > Repair