Error: HTIM: Delete order of main cell

Hi,

well our device is battery-run and uses a GPS Module from u-blox to track the position.

We could get back the trace from that exception but the function names could not be decoded, and I think the reason for that is that the functions are part of OpenAt, which is not accessible for us. So I wanted to know what the error means and maybe I can narrow the problem down. So, where can I see what the error “HTIM: Delete order of main cell” means?

Thanks!