Can't install some packages

[seal-git]

When installing packages by using pipenv, it fails to install Tensorflow and igonres some packages.

Installation command: pipenv install -r requirements.txt
Environment: Pipenv 2022.1.8, Pyenv 2.2.3-4-g971397dd

Error mssage:

Ignoring jsonschema: markers 'python_version >= "3.7"' don't match your environment
An error occurred while installing tensorflow==2.6.2 --hash=sha256:16dc1... 
Ignoring traitlets: markers 'python_version >= "3.7"' don't match your environment
Installing initially failed dependencies...
[pipenv.exceptions.InstallError]: Collecting tensorflow==2.6.2
ERROR: Couldn't install package: tensorflow

(On line 2, hash value continues. )

If I removed the requiements of Tensorflow, pipenv installation finished successfully.
Is Tensorflow necessary? I couldn't find any scrits which requires tensorflow.