cm:stacks:seed fails with error: Content Type creation failed

Hello!

I deleted all the content types, assets, entries, everything from a Stack.

Then I ran: `csdx cm:stacks:seed --repo "contentstack/stack-starter-app" -k xxxxxxxxxxxxx`

I had run this command before without issues, but now I’m getting this error:

...

info: Started to seed content types
error: Content Type creation failed. Please try again. title is not unique.
error: Failed to migrate stack: Sandbox Mauricio. Please check error logs for more info
error: Failed to import content types

I’m 100% sure I deleted all content-types, entries, assets, before running the seed command, but still it seems to be a conflict. Tried the same steps more than once and had same results. 

Any ideas about what could be the issue?