We have updated the content model editor to give you more flexibility around the validations you can apply when configuring the Slug field appearance. You can now choose whether a slug field should enforce uniqueness by selecting or de-selecting the Unique field checkbox under the “Validation” section. To ensure consistency with existing setups, uniqueness validation is enabled by default when you select the Slug appearance. You can de-select the checkbox at any time. Before the improvement, the Unique field checkbox was not editable.