Unable to disable echo cancellation on channel

Hello,
I am having these errors show up in the log intermittently. I am using Digium’s TE420B.

[Jul 17 03:46:10] WARNING[4215] chan_dahdi.c: Detected alarm on channel 86: Red Alarm
[Jul 17 03:46:10] WARNING[4215] chan_dahdi.c: Unable to disable echo cancellation on channel 86: Invalid argument

Thanks for your time.