Hi, Out of curiosity, I've been skimming the sipwise rtpengine code about this warning and found out that it happens when "__tree_coll_callback()" callback function is called. Now, the above callback function is present in different places that all reduce to calling "g_tree_insert_coll()" function in ./include/aux.h. Next, from what i see in "g_tree_insert_coll()" the above callback is **only** called when there is already an old value for the given (key, value) pair. In other words, there is already an "old ice pair" there. Hope this helps. Thank you, Stefan ------------------------------------------------------------------------ *From:* sr-users <sr-users-bounces(a)lists.kamailio.org> on behalf of ‪M S‬ <shaheryarkh(a)gmail.com> *Sent:* Friday, October 29, 2021 1:28 PM *To:* keffa(a)alcall.net; Kamailio (SER) - Users Mailing List *Subject:* Re: [SR-Users] RTPENGINE [ice] Priority collision between candidate pairs It's just a warning, you can ignore it or explain what is the exact nature of problem you are facing? -- Muhammad Shahzad Shafi Tel: +49 176 99 83 10 85 Sent from my Huawei P40 5G phone -------- Original message -------- From: keffa(a)alcall.net Date: Fri, 29 Oct 2021, 10:41 To: "Kamailio (SER) - Users Mailing List" <sr-users(a)lists.kamailio.org> Subject: [SR-Users] RTPENGINE [ice] Priority collision between candidate pairs Hello @everyone Please can you explain me how this message is errors or not ? «  Oct 29 08:34:44 ip76 rtpengine[649]: WARNING: [YGiXZ1MmIA port 30104]: [ice] Priority collision between candidate pairs 9oZd7sWNVguf6cgl:e4b19f6635447b850 » thank __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions   * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:   * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions * sr-users(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users