입력 변수 uri 에러

왜 에러가 발생할까요?

[ code ]

from flask import Flask

app = Flask(__name__)

@app.route("/")
def main_page():
return "<h1>Hello World</h1>"

@app.route("/test")
def test_page():
return "<h1>test page</h1>"

@app.route("/user/<user_id>")
def test_page(user_id):
return "<h1>" + user_id + "</h1>"


if __name__=="__main__":
app.run(host="0.0.0.0", port="8080")

[ Error message ]

File "main.py", line 14, in <module>

@app.route("/user/<user_id>")

File "/Users/youngjae/.pyenv/versions/3.7.8/lib/python3.7/site-packages/flask/app.py", line 1315, in decorator

self.add_url_rule(rule, endpoint, f, **options)

File "/Users/youngjae/.pyenv/versions/3.7.8/lib/python3.7/site-packages/flask/app.py", line 98, in wrapper_func

return f(self, *args, **kwargs)

File "/Users/youngjae/.pyenv/versions/3.7.8/lib/python3.7/site-packages/flask/app.py", line 1284, in add_url_rule

"existing endpoint function: %s" % endpoint

AssertionError: View function mapping is overwriting an existing endpoint function: test_page

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