Calling a lambda function once, it's executed twice

Question

This is more of a concern than a question, but still, has anyone experienced this before? Does anyone know how to prevent it?

I have a lambda function (L1) which cal

Answer 1

Your lambda function must be idempotent, because it can be called twice in different situations.

https://aws.amazon.com/premiumsupport/knowledge-center/lambda-function-idempotent/

https://cloudonaut.io/your-lambda-function-might-execute-twice-deal-with-it/