gemini-2.5-pro: API key not valid

AI generation failed: AI generation failed: All Gemini models failed. Details: gemini-flash-latest: API key not valid. Please pass a valid API key. | gemini-2.5-flash: API key not valid. Please pass a valid API key. | gemini-2.5-flash-lite: API key not valid. Please pass a valid API key. | gemini-2.5-pro: API key not valid. Please pass a valid API key. This is the problem i faced and no mistake in API key. If i want to change API key it starts from 2nd step and github already connected .How can i start with 1st step before github connection for same article . Suggest me a solution .