teams-adding project app to a channel

Hi,

I have difficulties to add the project app to a channel in microsoft teams.

I have created a format of a team for project managment in which I succeeded to add project app and to create a suitable format.

I have duplicated the team (created a team from an existing team), but whan i tried to add the project app to the new channel i got a massage that askes me to add the project app (again).

whan i tapped on the add button, I got a massage that the app is already added(!?)

how can i get out of this cycle?

thanks