Multiple instances of (references of) photos added to People after Recognize is run multiple times/People are merged/Faces are added

[Andreaux]

Describe the bug

I noticed after upgrading my docker image based installation to 30.0.0 and manually running classification in Recognize because it didn't seem to be triggered automatically (I might have been a bit impatient too) that multiple instances of the exact same photos were added to People. If I went into People, I would have 4-8 copies of each picture in different series. If I open them, they are the exact same image as the filename is up in the Tab name.
I can only get rid of them manually by selecting "Remove from person" because I assume using delete would remove the single image, and I don't want that, just the multiple references.

Steps To Reproduce

I can't really suggest any exact way to reproduce, however, the common theme seems to be that:

• running occ recognize:classify or occ recognize:cluster-faces
• merging people
• adding faces from the unidentified pool to people (where those pictures already probably exist)

causes the "duplication"

Platform

- OS: irrelevant
- Browser: irrelevant
- Memories Version: 7.4.1
- Recognize: 8.1.0
- Nextcloud Version: 30.0.0
- PHP Version: 8.2.23

Screenshots

Happy to provide more info/screenshots if needed.

Additional context

none.

[Andreaux]

I have noticed a couple of interesting things since my bug report:

1. the bubbles over People's index images showing how many pictures there is inside of that "person" don't take the duplicates into account. They only show the number of truly unique pictures in there.
2. If I open a person and remove duplicates manually, they get added to Recognize's clustering queue, they don't just disappear, despite being duplicate references to files already in a cluster (person).