Problem with new audio imports

Hello wonderful world! I am working with some tensorflow speech recognition and I encountered the following error:

tensorflow.python.framework.errors_impl.InvalidArgumentError: Graph execution error:

Can not squeeze dim[1], expected a dimension of 1, got 2
[[{{node Squeeze}}]]
[[IteratorGetNext]] [Op:__inference_adapt_step_1005]

This error occurred because I put new self recorded training data into the dataset. What is different about the new audio that I need to fix? I have attached my code and the audio files.