Hi Mario,
The safest approach is to use the Maintenance Planner tool to check the frontend/backend packages for the app against your landscape.
In the Fiori Apps Library when you select any of the CRM apps in the UICRM001 package you should see a link to "Maintenance Planner". This is a web based tool that helps confirm the possible combinations you need for both frontend and backend packages against your landscape.
Use the Login option in the top right hand corner of the Fiori Apps Library and it should default in your current landscape when you use the Maintenance Planner.
Good luck!
Rgds,
Jocelyn