The char0 field should never have been part of the arrays topics for the Test component because char is a synonym for string and arrays of strings are not allowed.

I have slowly removed all code that requires char0 to be present. At this point I believe there is just one unit test in ts_salkafka that needs it, and I will fix that on the same ticket.

There is also some code in ts_salobj that handles char0 if present, but should work if the field is absent.