Because poetry-project-instance depends on poetry-plugin-export (>1.8) which doesn't match any versions, version solving failed.

[sincorchetes]

Creating virtualenv pv-api-operational-05_nCJxg-py3.10 in /home/vsts/.cache/pypoetry/virtualenvs
Ensuring that the Poetry plugins required by the project are available...
The following Poetry plugins are required by the project but are not installed in Poetry's environment:

• poetry-plugin-export (>1.8)
  Installing Poetry plugins only for the current project...
  Updating dependencies
  Resolving dependencies...

Because poetry-project-instance depends on poetry-plugin-export (>1.8) which doesn't match any versions, version solving failed.
The following packages are already present in the pyproject.toml and will be skipped:

• pytest
• pytest-cov

If you want to update it to the latest compatible version, you can use poetry update package.
If you prefer to upgrade it to the latest available version, you can use poetry add package@latest.

Nothing to add.

[dimbleby]

duplicate python-poetry/poetry#9953