Error loading NerfactoModel

[Max-Dee]

RuntimeError: Error(s) in loading state_dict for NerfactoModel:
size mismatch for field.embedding_appearance.embedding.weight: copying a param with shape torch.Size([500, 32]) from checkpoint, the shape in current model is torch.Size([0, 32]).

please can you please explain to me what you I should save. A code snippet would be highly appreciated.