mutable-override: does it exist?

[jamesbraza]

Bug Report

Coming from https://mypy.readthedocs.io/en/stable/error_code_list2.html#check-that-overrides-of-mutable-attributes-are-safe, with mypy==1.7.1, Python 3.10.13, and the below config:

[tool.mypy]
enable_error_code = ["mutable-override"]

I get the below error when running mypy:

pyproject.toml: [mypy]: enable_error_code: Invalid error code(s): mutable-override

Does mutable-override even exist?

[hauntsaninja]

Use mypy 1.8