superset db upgrade pkg_resources.ContextualVersionConflict

[babybear1992]

I follow the instructions to install superset. After installation, I execute the command superset db upgrade, the following error occurs:
pkg_resources.ContextualVersionConflict: (Flask 0.12.4 (/root/miniconda3/envs/ss/lib/python3.6/site-packages), Requirement.parse('Flask>=1.0'), {'Flask-JWT-Extended'})
I am confused and don't know how to slove this issue. Is there any guidance that I can reference to?

Screenshots

The screenshot is as below

Environment

• superset version: 0.28.1
• python version: 3.6.7
• Flask version: 0.12.4

Checklist

Make sure these boxes are checked before submitting your issue - thank you!

• [-] I have checked the superset logs for python stacktraces and included it here as text if there are any.
• [-] I have reproduced the issue with at least the latest released version of superset.
• [-] I have checked the issue tracker for the same issue and I haven't found one similar.

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[mikefab]

Solved this with:
pip install flask==1.0.0

Then ran into: "Can't determine which FROM clause to join from, there are multiple FROMS which can join to this entity."
Solved with:

pip install sqlalchemy==1.2.18
thanks to: #6977 (comment)

[babybear1992]

Solved this with:
pip install flask==1.0.0

Then ran into: "Can't determine which FROM clause to join from, there are multiple FROMS which can join to this entity."
Solved with:

pip install sqlalchemy==1.2.18
thanks to: #6977 (comment)

Thanks, it worked finally!