The name 'collection' is already registered for this blueprint. Use 'name=' to provide a unique name. This will become an error in Flask 2.1

Issue

from collection import collection_api

app.register_blueprint(collection_api, url_prefix="/typing-session")
app.register_blueprint(collection_api, url_prefix="/api/dataservice/typing-session)

It is already created, how do i fix this?

Solution

You are trying to register the same Blueprint twice.

Change the second line to app.register_blueprint(collection_api, name="<some_unique_name>", url_prefix="/api/dataservice/typing-session)

Answered By – Simeon Nedkov

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