E: Version '18.06.1~ce~3-0~ubuntu' for 'docker-ce-cli' was not found

Only way to get rid of the error was to not install docker-ce-cli

$ sudo apt-get install docker-ce=18.06.1~ce~3-0~ubuntu containerd.io

check version

$ docker version
Client:
 Version:           18.06.1-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        e68fc7a
 Built:             Tue Aug 21 17:24:51 2018
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.1-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       e68fc7a
  Built:            Tue Aug 21 17:23:15 2018
  OS/Arch:          linux/amd64
  Experimental:     false

To my knowledge the docker-ce-cli package was introduced in Docker CE 18.09. Before that docker-ce does not have that as a dependency. You can check that by for example look into the Packages file for Ubuntu Bionic: https://download.docker.com/linux/ubuntu/dists/bionic/stable/binary-amd64/Packages

Cheers!