AIX 6.1 is out of support, it ended in April 2017.
Your AIX TL/SP, TL09 SP04, was released 3 years ago, week 41 of 2014.
Why was TL06 recommended, was an APAR identified, if so which one?
You might find a fix in the last AIX 6.1 release, 6100-09-09 released in April 2017.
Or you could update to...