Frequent 429 Errors with Gemini API Despite Paid Account

I am using the Gemini API (gemini-2.0-flash-lite-preview-02-05), and I encounter a 429 error if I make multiple requests within a minute. However, if I immediately switch to another API key, it starts working again.

I am a paid user, and I have confirmed that my paid account is properly linked to the Gemini API project. I also checked the API usage reports and did not receive any warnings about exceeding the quota.

Why am I experiencing these rate limits despite having a paid account? How can I prevent this issue?

Thanks

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