The '__version__' attribute is deprecated and will be removed in Flask 3.2.

[OrangeDog]

Describe the bug:
Warnings reported when using the latest version of Flask.

.venv\Lib\site-packages\elasticapm\contrib\flask\__init__.py:126: DeprecationWarning: The '__version__' attribute is deprecated and will be removed in Flask 3.2. Use feature detection or 'importlib.metadata.version("flask")' instead.
    defaults["framework_version"] = getattr(flask, "__version__", "<0.7")

To Reproduce

app = Flask(__name__, instance_relative_config=True)
app.config.from_object('config')
apm = ElasticAPM(app)

Environment (please complete the following information)

• OS: Windows

• Python version: 3.12.6

• Framework and version: Flask 3.1.3

• APM Server version: N/A

• Agent version: 6.25.0

• Agent config options

  Click to expand

  ENABLED = False
  

• requirements.txt:

  Click to expand

  blinker==1.9.0; python_version >= '3.9'
  certifi==2026.4.22; python_version >= '3.7'
  cffi==2.0.0; python_version >= '3.9'
  click==8.3.3; python_version >= '3.10'
  colorama==0.4.6; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6'
  ecs-logging==2.3.0; python_version >= '3.8'
  elastic-apm[flask]==6.25.0; python_version >= '3.6' and python_version < '4'
  flask==3.1.3; python_version >= '3.9'
  flask-basicauth==0.2.0
  geographiclib==2.1; python_version >= '3.7'
  geopy==2.4.1; python_version >= '3.7'
  gevent==26.4.0; python_version >= '3.9'
  greenlet==3.5.0; python_version >= '3.10'
  gunicorn[gevent]==25.3.0; python_version >= '3.10'
  itsdangerous==2.2.0; python_version >= '3.8'
  jinja2==3.1.6; python_version >= '3.7'
  markupsafe==3.0.3; python_version >= '3.9'
  packaging==26.2; python_version >= '3.8'
  pycparser==3.0; python_version >= '3.10'
  urllib3==2.6.3; python_version >= '3.9'
  werkzeug==3.1.8; python_version >= '3.9'
  wrapt==2.1.2; python_version >= '3.9'
  zope.event==6.1; python_version >= '3.10'
  zope.interface==8.4; python_version >= '3.10'
  

[xrmx]

@OrangeDog thanks for reporting, should be easy to fix.