ioctl returns 22: Invalid argument

[axet]

duperemove failed on my drive.

Comparison of extent info shows a net change in shared extents of: 3.2MB
Loading only duplicated hashes from hashfile.
Found 2 identical extents.
Simple read and compare of file data found 1 instances of extents that might benefit from deduplication.
Showing 2 identical extents of length 16.0KB with id eb94eb62
Start		Filename
256.0KB	"/home/axet/Android/Sdk/platform-tools/make_f2fs"
256.0KB	"/home/axet/Android/Sdk/platform-tools/make_f2fs_casefold"
Using 8 threads for dedupe phase
[0x55e4d9a236c0] (1/1) Try to dedupe extents with id eb94eb62
[0x55e4d9a236c0] Dedupe 1 extents (id: eb94eb62) with target: (256.0KB, 16.0KB), "/home/axet/Android/Sdk/platform-tools/make_f2fs"
FAILURE: Dedupe ioctl returns 22: Invalid argument
Comparison of extent info shows a net change in shared extents of: 0.0B

0.15.2-1