Can´t get backto oreo

edited September 2020 in ZenFone 4 Series
APP Name: na
Rooted: No
Frequency of Occurrence: Always
Firmware/APP Version: Pie Beta
RAM: 6G
ZF Model: ZE554KL

Hello. I was given this phone as a gift. It has the Pie beta installed and I would like to get it back to Oreo. But after I downloaded the rollback ROM, when I try to install it I get the same message as on the other posts. What can I do to get it back to Oreo?

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