TFlite export wrong

I want to export yolov8n.pt through TFLite, but encountered the following bug during the export process.
TensorFlow SavedModel: export failure ❌ 20.8s: cannot import name 'metadata_schema_py_generated' from 'tflite_support.metadata' (C:\conda\envs\yolov8\lib\site-packages\tflite_support\metadata.py)
Traceback (most recent call last):
File "c:\my_programm\yolov8\test.py", line 7, in
model.export(format="tflite") # creates 'yolov8n_float32.tflite'
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\model.py", line 591, in export
return Exporter(overrides=args, _callbacks=self.callbacks)(model=self.model)
File "C:\conda\envs\yolov8\lib\site-packages\torch\utils_contextlib.py", line 115, in decorate_context
return func(*args, **kwargs)
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\exporter.py", line 313, in call
f[5], keras_model = self.export_saved_model()
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\exporter.py", line 142, in outer_func
raise e
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\exporter.py", line 137, in outer_func
f, model = inner_func(*args, **kwargs)
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\exporter.py", line 900, in export_saved_model
f.unlink() if "quant_with_int16_act.tflite" in str(f) else self._add_tflite_metadata(file)
File "C:\conda\envs\yolov8\lib\site-packages\ultralytics\engine\exporter.py", line 1024, in _add_tflite_metadata
from tflite_support.metadata import metadata_schema_py_generated as schema # noqa
ImportError: cannot import name 'metadata_schema_py_generated' from 'tflite_support.metadata' (C:\conda\envs\yolov8\lib\site-packages\tflite_support\metadata.py)
This is where the error occurred.

But after I imported the same module in both branches, the bug was resolved.

Reproduce the TFLite export using the reported yolov8n.pt example and inspect the _add_tflite_metadata path in ultralytics/engine/exporter.py together with the tflite_support.metadata import. Verify the behavior across the relevant package versions; done means the export completes and the generated TFLite model receives metadata without the ImportError.