In /usr/lib/x86_64-linux-gnu/libopencv_dnn.so.4.5.1 I've found a symbol `_ZN2cv3dnn14dnn4_v202011173NetC1Ev`. It differs from expected `_ZN2cv3dnn14dnn4_v202009083NetC1Ev` on `...20201117...` (expected `...20200908...`). So maybe I need either a newer digikam or an older libopencv-dnn4.5.