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Unique

The Unique property prevents the duplication of current content across entries in a content type.

When you add a field to a content type and set it as Unique, that field will only accept non-duplicate values. If a user enters an existing value, they will get a prompt to change the duplicate value.

Note: If any fields are marked as Multiple then the Unique property will not work.

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About Field Properties
Display Name
Unique ID
Placeholder Value
Instruction Value
Help Text
Default Value
Validation (Regex)
Validation Error Message
Mandatory
Multiple
Non-localizable
Number of Characters
Allow images only
Allowed file type(s)
File size limit
Set date range
Mark as Group title
Selection Type
Limit for Multiple Choices
Display Type
Choice Data Type
Add Choices
Image Dimension Validation
Config Parameter (for Custom Fields only)
Referenced Content Type

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