Can't self update to latest preview 1.2.0a2 (missing sha256sum)

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Debian 11
• Poetry version: 1.1.7
• Link of a Gist with the contents of your pyproject.toml file: N/A

Issue

poetry --version
Poetry version 1.1.7
poetry self update --preview
Updating to 1.2.0a2

  RuntimeError

  Could not find poetry-1.2.0a2-linux.sha256sum file

  at ~/.poetry/lib/poetry/console/commands/self/update.py:260 in _update
      256│         try:
      257│             r = urlopen(base_url + "/{}/{}".format(version, checksum))
      258│         except HTTPError as e:
      259│             if e.code == 404:
    → 260│                 raise RuntimeError("Could not find {} file".format(checksum))
      261│
      262│             raise
      263│
      264│         checksum = r.read().decode().strip()

[Kreshu]

I confirm, removing old installation with get-poetry.py --uninstall and installing with new script solves the issue.

[staticdev]

You are right, I made a confusion. I installed poetry in two machines and the one I got this error was with get-poetry.py.