Alleged triple installation of SMF_2-1-5

[Volker S]

I wanted to upgrade the forum using the package manager. This revealed errors in five files. These were files that had been manually manipulated (including QueryString.php and Subs.php; the other files had been modified for the Mod Autorotation).
I replaced these files with the original files from forum version 2.1.4. This resulted in an error-free starting point (see also image: SMF starting situation), and I performed the update.

...the result -> Image: SMF result.jpg

What I have not mentioned so far: I have also installed two additional themes, which (due to their age) also contain errors for the new forum software 2.1.5. So far, I have completely ignored these errors in order to look at these themes later. If a theme became unusable as a result, I deleted it.
Could this be related to the fact that I have a total of 3 themes (including the default theme) and a supposed triple installation?

During my last attempt, without replacing the 5 files with unmodified files, it seemed to be that the module"SMF_2.1.5 Update" was only installed twice. So it can't be due to the themes after all.
Because the Dev from Autorotation recommended that I should only be one version of SMF_2-1-5 update, I should tried to clean it up according to his recommendations (Link).

[shawnb61]

An issue was logged based on the earlier reports: https://github.com/SimpleMachines/SMF/issues/8689

I would keep one & delete the others.

I would next confirm versions are ok by running the version checker.  (It is safe to ignore version warnings on languages.)

[Volker S]

That was easy. Just delete the duplicates from the packages folder. Thank you.

[shawnb61]

I just used the delete button.

[Volker S]

I get a warning saying "Module is installed." I didn't want to risk that, so I thought it would be safer to simply delete it from the package folder. Here you can also see which packages have been uploaded "too many times" (package name.zip, package name-1.zip, package name-2.zip).