I've had this assert for years. happens occasionally. not sure why or how to reproduce. #4 0x00007f05aa8e4881 in Akonadi::ResourceBase::deferTask (this=0x7ffe45fc8b00) at /data/kde/src/5.2020/kde/pim/akonadi/src/agentbase/resourcebase.cpp:1232 nothing else useful in the backtrace