Is this SCA or BFI? The log looks like SCA.
Have a look at Duplicate x-fixlet-scm-id when installing Compliance 1.9 and the support article linked there. Security Checklist fixlets can’t just be copied and pasted, they have some metadata not visible in the console that is used in the SCA database. The relevance and database queries can help identify the duplicates, which you will need to delete or export-edit-import to make the x-fixlet-scm-id values unique.
To make custom copies of the checklist or individual fixlets, use the checklist wizards in the future.