Reduce the disk space/shrink the LVM in an Linux HVM using kpartx

kpartx -av /dev/vg_67/vm102_img

It will then say something about mapping the partition, and will probably create this:
/dev/vg_67/vm102_img1

This relates to that one partition.

now you can do
e2fsck -f -y /dev/vg_67/vm102_img1
resize2fs /dev/vg_67/vm102_img1 24G

then disable kpartx on the lv

kpartx -d /dev/vg_67/vm102_img

now lvreduce to 25G

lvrdeuce -L 25G /dev/vg_67/vm102_img

then you can use kpartx once more to increase the partition to fill the LV, just resize2fs /path you dont need to specify a size.

resize2fs /dev/vg_67/vm102_img