media-video/openshot-2.4.0 conflicts with media-gfx/imagemagick-7.0.7.6::media-kit

media-video/openshot-2.4.0 conflicts with current version of media-gfx/imagemagick-7.0.7.6
and wants to install downgraded version imagemagick-6.9.9.18

actual emerge output looks like this:
emerge video/openshot
These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N     ] dev-libs/libsodium-1.0.15:0/23::dev-kit  USE="asm urandom -minimal -static-libs" CPU_FLAGS_X86="aes sse4_1" 0 KiB
[ebuild  N     ] net-dns/c-ares-1.13.0:0/2::net-kit  USE="-static-libs" ABI_X86="32 (64) (-x32)" 0 KiB
[ebuild  N     ] dev-python/sip-4.19.2:0/12::python-kit  USE="-debug -doc" PYTHON_TARGETS="python2_7 python3_4 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] dev-python/greenlet-0.4.12::python-kit  USE="-doc" PYTHON_TARGETS="python2_7 python3_4 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] dev-python/httplib2-0.10.3::python-kit  PYTHON_TARGETS="python2_7 python3_4 -pypy -pypy3 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] dev-python/py-1.4.32::python-kit  USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_4 -pypy -pypy3 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] virtual/python-greenlet-1.0::python-kit  PYTHON_TARGETS="python2_7 python3_4 -pypy -pypy3 -python3_5" 0 KiB
[ebuild  N     ] dev-python/gevent-1.2.1::python-kit  USE="-doc -examples" PYTHON_TARGETS="python2_7 python3_4 -pypy -python3_5" 0 KiB
[ebuild  N     ] media-libs/libopenshot-audio-0.1.4::media-kit  0 KiB
[ebuild  N     ] net-libs/zeromq-4.2.2-r2:0/5::net-kit  USE="sodium -doc -pgm -static-libs {-test} -unwind" 0 KiB
[ebuild  N     ] dev-python/pyzmq-15.2.0::python-kit  USE="-doc -examples {-test}" PYTHON_TARGETS="python2_7 python3_4 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] net-libs/cppzmq-0_pre150606::net-kit  0 KiB
[ebuild     UD ] media-gfx/imagemagick-6.9.9.18:0/6.9.9.18::media-kit [7.0.7.6:0/7.0.7.6::media-kit] USE="X bzip2 cxx djvu jpeg jpeg2k lzma openmp png svg tiff truetype webp wmf xml zlib -corefonts -fftw -fontconfig -fpx -graphviz -hdri -jbig -lcms -lqr -opencl -openexr -pango -perl -postscript -q32 -q8 -raw -static-libs {-test}" 0 KiB
[ebuild  N     ] dev-python/PyQt5-5.8.2::python-kit  USE="dbus gui network opengl printsupport svg webkit widgets -bluetooth -debug -declarative -designer -doc -examples -gles2 -help -location -multimedia -positioning -sensors -serialport -sql -testlib -webchannel -webengine -websockets -x11extras -xmlpatterns" PYTHON_TARGETS="python2_7 python3_4 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] media-libs/libopenshot-0.1.8::media-kit  USE="imagemagick python (-libav) {-test}" PYTHON_SINGLE_TARGET="python3_4 -python3_5 -python3_6" PYTHON_TARGETS="python3_4 -python3_5 -python3_6" 0 KiB
[ebuild  N     ] media-video/openshot-2.4.0:1::media-kit  PYTHON_SINGLE_TARGET="python3_4 -python3_5 -python3_6" PYTHON_TARGETS="python3_4 -python3_5 -python3_6" 0 KiB

Total: 16 packages (1 downgrade, 15 new), Size of downloads: 0 KiB

Oops! Conflicts have been encountered:

>>> media-libs/libopenshot-0.1.8:0/0::media-kit, ebuild scheduled for merge, wants <media-gfx/imagemagick-7:0=[cxx]
>>> media-gfx/uniconvertor-2.0_pre379-r2:0/0::media-kit, installed, wants media-gfx/imagemagick:0/7.0.7.6=

My candidates are:

>>> media-gfx/imagemagick-6.9.9.18:0/6.9.9.18::media-kit, ebuild scheduled for merge has SLOT 0/6.9.9.18
>>> media-gfx/imagemagick-7.0.7.6:0/7.0.7.6::media-kit, installed has SLOT 0/7.0.7.6

We hope this informational output has been useful in identifying the
problem. We are continually working to reduce conflicts. Do not
hesitate to report a bug at https://bugs.funtoo.org. Thank you!