Atempting to add Bodysetup_274747933 at index 0 but another object (0x0000018addbe8c60) exists at that index

Hi! UE5.0.3 has a bug when running Cesium for a long time. What is the problem and how can it be solved?

Hi @1841139770, welcome to the community!
I haven’t seen that error, and don’t know what might cause it. Since it just started cropping up, you might try reverting to an older version of your project and see if it still occurs.
By the way, we are no longer releasing new versions of Cesium for Unreal for UE 5.0.3, primarily due to Epic’s rules against publishing new versions of the plugin for anything but the 3 most recent UE versions. We recommend you upgrade as soon as you can.