[OpenSIPS-Users] Opensips sometime resend Accouting-request to freeradius

[ha do]

Hi list

i am test 
opensips 1.6.4
freeradius from ag-projects
cdrtool version 8.0.17
callcontrol version 2.0.8

there is sometimes opensips resend Accounting-Request to freeradius and make freeradius seems to reject message from opensips

here is the pastebin link:
http://pastebin.com/d1k38n5a -  freeradius log
http://pastebin.com/ww2Dq3SC - opensips.cfg

how to resolve problem

Thank you