After the replacement, however, pilots that flew a Denpasar-Jakarta flight still found a 20° difference on the left-hand angle-of-attack sensor. During this flight, the pilots implemented "a number of procedures" to rectify the issues, and the jet subsequently landed in Jakarta safely.
I found the underlined quote from the article curious. Either they have an AOA Indicator on the PFD, or they were able to get into the Maintenance side of the FMS, or a maintenance person on the flight deck plugged into the Mx port. An AOA Indicator is an option and it does read up to a maximum value of + 21 degrees. That would seem to be an extreme value to see inflight after the aircraft was just returned to service (‘fixed’).