Answer by 1rq3fea324wre for Ubuntu 18.04 Can't upgrade because of libpython3.6 version conflicts

I had a similar problem and this cmd helped me:sudo apt-get install gdb/bionic gir1.2-peas-1.0/bionic libpeas-1.0-0/bionic python3.6/bionic python3.6-minimal/bionic libpython3.6/bionic libpython3.6-minimal/bionic libpython3.6-stdlib/bionic