Problem #

Multiple themes with the same name appear as options for System Theme in the General at Configuration () > System Settings > General Settings.

Cause #

Two templates have identical names in their respective theme.yaml files.

For example, you may have created a copy of the Six theme in order to create a custom template but forgotten to update the theme.yaml file to rename the custom template.

Solution #

Update the custom theme.yaml file to give your theme a distinct name value. You may also want to update the description and author values:

name: "My Custom Theme"
author: "My Company"
properties:
  serverSidePagination: false # Defines client side will handle pagination

Last modified: 2025 October 17