I found a case where pprepair introduces two duplicate vertices in one polygon at the junction of three polygons.
Example: the yellow polygon initially has no vertices at the junction, but after running pprepair (the new branch) with -r fix it has two vertices at the junction with the same coordinates. See screenshot.
I found a case where pprepair introduces two duplicate vertices in one polygon at the junction of three polygons. Example: the yellow polygon initially has no vertices at the junction, but after running pprepair (the
newbranch) with-r fixit has two vertices at the junction with the same coordinates. See screenshot.gpkg file with the 3 polygons