My snaps polute disk space

I build my own snaps for personal use using snapcraft.
When I install them they are installed in
/snap/<snap name>/x1
When I install new version it is installed in
/snap/<snap name>/x2
/snap/<snap name>/x3

and I need to configure it again.
Is it possible to force new package installation over x1 and do not create x2, x3, … folders which pollute hard drive?