Dataset validation failed: {consecutive_turns: [73]} error while tuning gemini-1.0-pro-002

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I created a jsonl file dataset to fine tune gemini 1.0. But my attempts result in the error with this message. I did my best to follow the documentation. The format of messages are like this:

...
{"messages": [{"role": "user", "content": "some message"}, {"role": "model", "content": "some response"}]}
{"messages": [{"role": "user", "content": some message"}, {"role": "model", "content": "some response"}]}
{"messages": [{"role": "user", "content": "some message"}, {"role": "model", "content": "some response"}]}
{"messages": [{"role": "user", "content": "some message"}, {"role": "model", "content": "some response"}]}
{"messages": [{"role": "user", "content": some message"}, {"role": "model", "content": "some response"}]}
{"messages": [{"role": "user", "content": "some message"}, {"role": "model", "content": "some response"}]}
...