version 5.5.7 maintenance release of the stable branch 5.5 that includes fixes since the release of v5.5.6. There is no change to database schema or configuration language structure that you have to do on previous installations of v5.5.x. Deployments running previous v5.5.x versions are strongly recommended to be upgraded to v5.5.7. Note that 5.5 is now the third last stable branch, v5.5.7 being the last planned released in 5.5.x series. The latest two stable branch are 5.6 and 5.7, with v5.7.1 being released a while ago. For more details about version 5.5.7 (including links and guidelines to download the tarball or from GIT repository), visit: * https://www.kamailio.org/w/2023/07/kamailio-v5-5-7-released/