The documentation page MODEL_DOC/&AMP;NUM;TRANSFORMERS.UMT5CONFIG.NUM_DECODER_LAYERS doesn’t exist in v4.53.2, but exists on the main version. Click <a href="/docs/transformers/main/en/model_doc/&amp;num;transformers.UMT5Config.num_decoder_layers">here</a> to redirect to the main version of the documentation.