Thank you, the problem was solved...


~$ guix package -u lollypop
The following package will be upgraded:
   lollypop (dependencies or package changed)

guix package: error: profile contains conflicting entries for gstreamer
guix package: error:   first entry: gstreamer@1.16.2 /gnu/store/mpp1havy3dk9r1y9wmim21nxk99zfzn0-gstreamer-1.16.2
guix package: error:    ... propagated from gst-plugins-good@1.16.2
guix package: error:    ... propagated from lollypop@1.4.2
guix package: error:   second entry: gstreamer@1.16.2 /gnu/store/par5fhvqx8hssx7dh61i6cagfgppwyh0-gstreamer-1.16.2
guix package: error:    ... propagated from gst-plugins-base@1.16.2
guix package: error:    ... propagated from gst-libav@1.16.2
hint: Try upgrading both `lollypop' and `gst-libav', or remove one of them from
the profile.

~$ guix package -u gst-libav
The following package will be upgraded:
   gst-libav (dependencies or package changed)

guix package: error: profile contains conflicting entries for gstreamer
guix package: error:   first entry: gstreamer@1.16.2 /gnu/store/mpp1havy3dk9r1y9wmim21nxk99zfzn0-gstreamer-1.16.2
guix package: error:    ... propagated from gst-libav@1.16.2
guix package: error:   second entry: gstreamer@1.16.2 /gnu/store/par5fhvqx8hssx7dh61i6cagfgppwyh0-gstreamer-1.16.2
guix package: error:    ... propagated from gst-plugins-base@1.16.2
guix package: error:    ... propagated from gst-plugins-ugly@1.16.2
guix package: error:    ... propagated from lollypop@1.4.2
hint: Try upgrading both `gst-libav' and `lollypop', or remove one of them from
the profile. 

 ~$ guix package -u lollypop -u gst-libav -u gtranslator
The following packages will be upgraded:
   gtranslator (dependencies or package changed)
   lollypop    (dependencies or package changed)

The following derivation will be built:
   /gnu/store/2957nz5jih3rd9z9lhg00y8rba40rfwn-profile.drv

applying 1 graft for /gnu/store/wf2cgbcfzgf05zg4zsx5rssf3q8w6m82-gmime-3.2.7.drv ...
applying 13 grafts for /gnu/store/0q2alnyq4qfhphis5nprivwfhka7zbi9-glade-3.36.0.drv ...
applying 14 grafts for /gnu/store/2whvnv5sdv957kajh5pi9f2hl4dw8vsa-libgda-5.2.10.drv ...
applying 7 grafts for /gnu/store/6q2piffhp8fxazqigjsqxii9bwmkvdgf-libhandy-1.0.2.drv ...
applying 12 grafts for /gnu/store/gq8ypjnnvmjvyd849wgf3q7xn4ikk21n-gtranslator-3.36.0.drv ...
applying 3 grafts for /gnu/store/nrpyw5d4r48lw7lg1na4x14x963mdfdl-python-gst-1.16.2.drv ...
applying 7 grafts for /gnu/store/l1s5cspy071by56h0nlrihi0py41y9rl-python-pillow-8.0.1.drv ...
applying 10 grafts for /gnu/store/i4h6pg5cfh61fqgmc9czai0q6zl16m7x-sdl-1.2.15.drv ...
applying 25 grafts for /gnu/store/baywnyr15jf0kmr8gi4gxkx46b1x9ldv-lollypop-1.4.2.drv ...
applying 4 grafts for /gnu/store/4avb54p5x47vkbzm2kcciqhiscx317rr-libmpeg2-0.5.1.drv ...
applying 4 grafts for /gnu/store/5q0vf93n91sqzs6wninxnan9ix4iql5v-gst-plugins-ugly-1.16.2.drv ...
building CA certificate bundle...
building fonts directory...
generating GLib schema cache...
creating GTK+ icon theme cache...
building cache files for GTK+ input methods...
building directory of Info manuals...
building database for manual pages...
building XDG desktop file cache...
building XDG MIME database...
building profile with 16 packages...