503 Service Unavailable in N8N workflow

i use the n8n workflow, with ai agent with the gemini model (gemini-2.5-flash), but then the workflow face a execution error, where the error is show like this:

Service unavailable - try again later or consider setting this node to retry automatically (in the node settings)
[GoogleGenerativeAI Error]: Error fetching from https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent: [503 Service Unavailable] This model is currently experiencing high demand. Spikes in demand are usually temporary. Please try again later.

Is this mean by in that execution, it have use multiple times of the ai agent with the model? or is mean by at that moment have other user around the world is use the model, so my execution fail?

Should i just wait for it or what can i do?

Thanks for anyone who give me opinion :slight_smile: .

Hello @Jing_Yang1 ,

503 errors are due to our services being temporarily overloaded. Please see this pinned post for suggestions on how to handle this.