OpenAI fine-tuner: DataSpec generated by configure does not match spec after execution

I have downloaded the workflow “Fine-Tune a Chat Model” available on the Hub (Thanks for that btw). The OpenAI Chat Model Fine-Tuner gave me a warning: DataSpec generated by configure does not match spec after execution. The workflow did work, but I don’t understand the warning. Any idea?

Can you share the link to the workflow?