Error message after python -m pip install -r requirements.txt

[lcancio]

I got this error using python 3.7 and after using python -m pip install -r requirements.txt command:

ERROR: Ignored the following versions that require a different python version: 6.0.0 Requires-Python >=3.8.1; 6.1.0 Requires-Python >=3.8.1; 7.0.0 Requires-Python >=3.8.1; 7.1.0 Requires-Python >=3.8.1 ERROR: Could not find a version that satisfies the requirement flake8==6.0.0 (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.3.1, 1.4, 1.5, 1.6, 1.6.1, 1.6.2, 1.7.0, 2.0, 2.1.0, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.3.0, 2.4.0, 2.4.1, 2.5.0, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.6.0, 2.6.1, 2.6.2, 3.0.0b1, 3.0.0b2, 3.0.0, 3.0.1, 3.0.2.dev0, 3.0.2.dev1, 3.0.2, 3.0.3, 3.0.4, 3.1.0, 3.1.1, 3.2.0, 3.2.1, 3.3.0.dev0, 3.3.0, 3.4.0, 3.4.1, 3.5.0, 3.6.0, 3.7.0, 3.7.1, 3.7.2, 3.7.3, 3.7.4, 3.7.5, 3.7.6, 3.7.7, 3.7.8, 3.7.9, 3.8.0a1, 3.8.0a2, 3.8.0, 3.8.1, 3.8.2, 3.8.3, 3.8.4, 3.9.0, 3.9.1, 3.9.2, 4.0.0, 4.0.1, 5.0.0, 5.0.1, 5.0.2, 5.0.3, 5.0.4) ERROR: No matching distribution found for flake8==6.0.0