Installation of Docker failed at the Beginning itself in Raspberry Pi

I want to Install the Cedalo Platform into my raspberry pi 3+, I followed the instructions of
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo reboot

after the reboot, the below instruction was copied and pasted in the raspberry pi terminal.
and the result is seen below the instruction.
I request the Community to support me to solve this issue please

$ curl -fsSL raw.githubusercontent.com/cedalo/streamsheets-installer/master/pi-installer.sh -o get-streamsheets.sh && sh get-streamsheets.sh
Installing Docker

Executing docker install script, commit: 93d2499759296ac1f9c510605fef85052a2c32be

  • sudo -E sh -c apt-get update -qq >/dev/null
    E: Repository >>Index of /raspbian buster InRelease’ changed its ‘Suite’ value from ‘stable’ to ‘oldstable’
    usermod: group ‘docker’ does not exist
    Installation of Docker failed, try again or search for help at --forum.cedalo.com

Running the below command solved the issue for me. thank you

$ sudo apt update --allow-releaseinfo-change

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