CDR show's a record per extension present in ring group

Howdy,

Migrating from freepbx 12 asd asterisk 11.
I have a ringgroup with two extensions with ringall, and when one of it answers, i have an extra line in cdr with the extension that was ringing but didn’t answered the call.
How make this with the previous behavior, having just one line with the info of the extension that answered the call (on lastdata column)

Thanks in advanced,