installations error on req.txt

[SurweeshSP]

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ERROR: Cannot install -r req.txt (line 2) and Flask==2.1.1 because these package versions have conflicting dependencies.

The conflict is caused by:
The user requested Flask==2.1.1
flask-sqlalchemy 3.0.1 depends on Flask>=2.2

To fix this you could try to:

1. loosen the range of package versions you've specified
2. remove package versions to allow pip to attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

Mismatching versions of the flask Library...