Will a value in a primary field that repeats itself more than once be a problem down the road?
For example:
My primary field is the e-mail of the community member.
I want to allow them to register multiple times with the same email - each time to another community (I have a column that stores the name of the community).
Is this problematic?
see attached print screen.

Duplication can be a problem for creating dynamic pages and using these items in reference fields. Note though, that each item has its own unique ID, which is hidden by default.
Thanks Sam!
so I can change the primary field to be the unique ID?
do you have a solution for me?
You can’t actually change the primary field to be the unique ID.
Solutions would depend on exactly what you’re trying to do.
The best solution for me is to set the primaty filed to be combination of two fields (email+community).
Can I do it?
If I can’t I don’t have a field that can be unique…
Maybe it’s not a problem if I don’t use reference fields at all?
You can’t combine fields either. It could be that you won’t have a problem the way you have it now.
I try to make 2 fields with different feature, but it is not work.
This is the two field I need to create:
- one field accept text and number in same field like ( rr10)
- I want to make permissions of the field to not accept any duplicate data entry from the members.