Field Feature, Help -_-

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1

I try to make 2 fields with different feature, but it is not work.
This is the two field I need to create:

  1. one field accept text and number in same field like ( rr10)
  2. I want to make permissions of the field to not accept any duplicate data entry from the members.
2

  1. you need to use regular expressions as a pattern match for that

  2. this is more advanced, you need to lookup what they type in the data collection and if duplicate handle that in your code