managed to make a custom voice but cant use it

[usernamex1x23]

error i am get using google colab

I manage to clone my voice named the file first.npz
then i changed the histroy_prompt to the name of the file
audio_array = generate_audio(text_prompt, history_prompt="first")
Audio(audio_array, rate=SAMPLE_RATE)

got this error any way to fix it

_AssertionError Traceback (most recent call last)
in <cell line: 4>()
2 [Excited]basic youtube video opening. [Pause] sub to my channel,
3 """
----> 4 audio_array = generate_audio(text_prompt, history_prompt="first")
5 Audio(audio_array, rate=SAMPLE_RATE)

2 frames
/usr/local/lib/python3.10/dist-packages/bark/generation.py in generate_text_semantic(text, history_prompt, temp, top_k, top_p, silent, min_eos_p, max_gen_duration_s, allow_early_stop, use_kv_caching)
409 semantic_history = np.load(history_prompt)["semantic_prompt"]
410 else:
--> 411 assert (history_prompt in ALLOWED_PROMPTS)
412 semantic_history = np.load(
413 os.path.join(CUR_PATH, "assets", "prompts", f"{history_prompt}.npz")_