app/__init__.py

 from . import admin_insert
 app.register_blueprint(admin_insert.bp)
 app.add_url_rule('/admin_insert', endpoint='admin_insert')
+
+from . import admin_remove
+app.register_blueprint(admin_remove.bp)
+app.add_url_rule('/admin_remove', endpoint='admin_remove')

app/admin_insert.py

 bp = Blueprint('admin_insert', __name__)
 
 @bp.route('/admin_insert', methods=('GET', 'POST'))
-def admin():
+def admin_insert():
     form = StationForm()
     if form.validate_on_submit():
         db = get_db()