By switching to newer major version of Turris OS - project.turris.cz is not compatible
On support, I see there were multiple responds about it and that people are trying to find registration code for our old data collection system to use it on project.turris.cz, but in fact, this is not necessary and they can be part of new device threat detection, but selecting and installing it from package list.
This is mostly related from migration from Turris OS 3.x to Turris OS 5.x.