But I am no using Bart. I am just trying to understand why would a working model stop working. I used pre-trained XLM which I fined-tuned and reused many times for transfer learning. I am beginning to think that my model become incompatible after Huggingface updated pip module which I automatically install at runtime, and now my model is creating abnormal condition. Is there any way to “turn the clock back”? I think the code involved is here Huggingface tokenizer