COPA Summarization deactivation KEDV/KEDU

Hi Experts , I need some inputs on of the issue we are facing . The COPA summarization levels in KEDV gets deactivated suddenly . We could not find any possible reason which could trigger this ... I would like to what could be possibe reason for such frequent deactivation? ... Also I would to know if archiving COPA objects will trigger this

Any pointers would be highly appreciated

ram