The parameters (prompt, etc.) should be set only in the new modelfile (passed to `ollama create`), using a FROM referencing the previous ollama model. Parameters in a Modelfile override the hard-coded parameters from the GGUF itself (which are sometimes buggy); in fact from elsewhere in the thread it sounds like Mimo is missing proper stop tokens, or maybe templates in general; I'm not an expert).

This will show a separate entry in `ollama list` but only copy the Modelfile not the GGUF.

Alternatively, if you use the API, you can override parameters "temporarily". Some UIs let you do this easily, at least for common parameters.