Allowed type text is duplicated in the back end of image field

Problem/Motivation

After upgrading Drupal core to version 10.2.0, an issue has arisen within the image field functionality. Specifically, the image field is now permitting duplicate allowed image types, which goes against the expected behavior.

Steps to reproduce

Create or navigate to an existing content type with an image field. Observe that the image field is permitting the addition of duplicate image types (see attached screenshot for reference).