I have 2 partitions, 1 for boot and 1 for Ubuntu. I'm trying to shrink the Ubuntu partition to create one for Win11. But Gparted won't let me: every time I assign a new value to the size of the partition the program automatically changes it back to it's original size.
There are many questions similar to this one, but all I found had many partitions and the problem was they were trying to shrink a partition that was not the Ubuntu one.