Hi @jeshab
I finally understand why I did not see the lambda function when the error with the already existing function occurred, I was looking at the wrong region. 
I was looking at eu-central-1 but it was set to eu-west-1. Now I would like to change the region, but only changing it in ask-resources.json results in the error The CloudFormation deploy failed for Alexa region "default": UnknownError. What else needs to be changed?
Btw that’s the tread I opened
Best regards