Hi, 

I can't find how to prepopulate a dropdown list with existing values from another module. 

I have a field on Potentials named "Salle" and it's a lookup field fetching information from Products module. 

The 3 products fiels are: 

Those 3 fields appears in my Potentials separately, but I would need their "values" merged into a dropdown list for my users to select only one.  

Any help is highly appreciated!