Mark Custom Object Fields as Unique

Introducing the Unique Fields capability for Custom Objects. It enforces data integrity, prevents duplication across records, and sets the foundation for advanced de-duplication controls in future releases.
What’s New?
Added the option to mark a custom field as “Unique” during creation.
Supported field types: Single Line, Multi Line, Number, and Phone.
Option also available when creating new Custom Objects (to mark Primary Display Field as Unique).
Enforced limit of 10 unique fields per object (system-wide per subaccount).
Global uniqueness enforcement: no duplicates allowed across the subaccount, regardless of creation source (UI, Workflows, Forms, or APIs).
Irreversible downgrade:
 Once a field is marked unique, reverting to non-unique is possible but cannot be re-marked unique again. Also - already created custom fields cannot be marked as unique.
How to Use
Navigate to Settings → Custom Fields or while creating a Custom Object.
Choose a supported field type and toggle “Mark Field as Unique.”
Save changes — this setting applies globally across the subaccount.
When creating or importing records, duplicate entries in unique fields will trigger validation errors or warnings.
Go to Settings -> Custom Fields -> 3 dots in top right corner -> Edit Unique Fields to remove certain fields from uniqueness.
 Why This Matters
Guarantees data consistency across complex Custom Objects.
Reduces accidental duplication from bulk updates, or automated workflows.