I had a bit of Session Relevance that I have used in the past to detect duplicate x-fixlet-scm-id values. I seem to have lost it over the years but I’ve tried to reproduce it now. Try running this in the Console’s Presentation Debugger, or in the Web Reports QNA page and see whether it gets a result. This should show any duplicate x-fixlet-scm-id values, along with the names and sites of the fixlet(s) that have duplicate values.
(Ideally you should get no results from this. If you don’t get results and still want to validate that the queries work, change the ‘multiplicity’ clause below to
multiplicity of it = 1 )
(item 0 of it, item 1 of it, name of item 1 of item 2 of it, name of item 2 of item 2 of it) of (multiplicity of item 0 of it, item 0 of it, (item 0 of it, fixlets of item 1 of it, item 1 of it) whose (mime field "x-fixlet-scm-id" of item 1 of it = item 0 of it)) of (unique values whose (multiplicity of it > 1) of mime fields "x-fixlet-scm-id" of fixlets of it, it) of all bes sites