Specifying an index parameter two different ways is unsupported.
Specifically, in this instance, the problem was specifying job_name index created from two different sources: (INDEX1= and -b/-B).
After upgrading from 10.1 to 10.5 the symptom was reports that failed to load, despite having loaded successfully at 10.1.
In these cases, the 88-type record simply indicates an error of RC = 6.
The desire was for -b/-B to win, overriding what ACIF (or any of the indexers) might have found in the report.
However, that is not supported.
Remove one of the specifications.