I have a Google Action that is deployed to production (live) and was created with the old version of the Actions SDK where you have the action package, the so called 2nd version of the Actions SDK. My Action doesn't use Dialogflow so there is no migration button or whatsoever in the Actions console to perform a migration.
What I have tried is to use the new gactions.exe and just pull the current version of my Action. After just pulling I tried to push it back into my Google Action but the console output said "Actions project must specify at least one action in actions.yaml." So I added a custom action, but now the console output says that:
"Custom actions cannot be specified in projects which are not created using custom category."
I don't know how to resolve the issue, as I think that that error message isn't related to the Action's category "EDUCATION_AND_REFERENCE"?
Any help is very much appreciated on how to resolve the issue.
Ok, I figured out on my own how to migrate from an old (legacy) Google Action (v2) that haven't linked to/used a Dialogflow project to the new Conversational Action (v3).
I posted it separately as a guide: Guide: Migrate from an old (legacy) Google Action (v2) to the new Conversational Action (v3) if your Action isn't connected to Dialogflow