My cryptswap is now 4gb. I upgraded my RAM and I'd like to increase the swap accordingly to approx 8GB.

So far, I've reduced the size of my main sda1 partition with GParted by 4gb and I'm left with 4gb of unallocated space.

Next, I wanted to increase the swapsize of sda2 but GParted returns this error:

GParted 0.12.1 --enable-libparted-dmraid

Libparted 2.3

Move /dev/sda2 to the left and grow it from 3.88 GiB to 7.79 GiB 00:00:01 ( ERROR )

calibrate /dev/sda2 00:00:00 ( SUCCESS )

path: /dev/sda2
start: 616,994,814
end: 625,141,759
size 8,146,946 (3.88 GiB)
move partition to the left and grow it from 3.88 GiB to 7.79 GiB 00:00:00 ( ERROR )

old start: 616,994,814
old end:
old size: 8,146,946 (3.88 GiB)
requested start: 608,800,768
requested end: 625,139,711
requested size: 16,338,944 (7.79 GiB)
libparted messages ( INFO )

Unable to satisfy all constraints on the partition.
Can't have overlapping partitions.

I don't understand the statement

Can't have overlapping partitions.

The partitions do not overlap.

The output of swapon -s returns

/dev/mapper/cryptswap1                  partition   4073468 0   -1

I guess the issue I encountered with GParted is related to cryptswap?