IndexError: index 2 is out of bounds for axis 0 with size 2

[nan777999]

source vocabulary file has already existed, continue to next stage.
loading word embedding, it will take few minutes...
Traceback (most recent call last):
File "e:/实体识别/NER-master/rnn.py", line 153, in
embedding = load_word2vec_embedding(vocab_size)
File "e:\实体识别\NER-master\utils.py", line 264, in load_word2vec_embedding
embeddings[index] = coefs # 将词和对应的向量存到字典里
IndexError: index 2 is out of bounds for axis 0 with size 2

请问这是为什么 。我应该改哪里