V1 api version is returning 400 bad request

Gemini API
1

https://generativelanguage.googleapis.com/v1/models/gemini-1.5-pro-002:generateContent?key={myApiKey}

consistently getting bad request 400 http status code

changing v1 to v1beta works for me. What is the reason for v1 to fail suddenly?

3

hello can someone please answer this? Thanks !