Warning messages are issued for non-CSDATA.USER/GROUP custom fields.
When RACF custom fields are added that are not CSDATA.USER and/or CSDATA.GROUP, the RACF agent produces the following messages:-
CTS3087W Custom field xxxxxx.CSDATA.xxxxxx is ignored. See PRTDBG for details.
CTS3089W Custom fields loaded with errors. See PRTDBG and STDMSG for details.