I bothered with this for a long time.
Now I finally tested which program recreates these obscure entries.
Someone mentioned Avast.
Ccleaner is owned by Avast.
And yes, if you delete this entry, start Ccleaner this registry entry instantly gets recreated.
Bad practice to create something in the registry with just numbers instead of the product or company name, which is industry standard.
Especially for a so called "cleaner" which should keep things clean!
If anyone googles "1D0EC6DE-4A80-4CC3-A335-E6E41C951198" here you have the answer.