Autodestruct on dialog

Hi, sometimes i have a lot of warnings like this. What does it means?

> [2018-04-16 14:10:28] WARNING[2067] chan_sip.c: Autodestruct on dialog ‘4odta-jusaw@’ with owner SIP/8900-000000fe in place (Method: BYE). Rescheduling destruction for 10000 ms

Are you doing anything that would cause a channel to stay alive for a long time after the SIP session has terminated? For example, a long running h extension.