On 30.10.2021 15:49, David Sardari wrote:

Hi *,

I have a problem doing an incremental backup with "btrfs send/receive"
using a snapshot as parent, that has been incrementally saved on the
destination side itself. Attached you find the problem description and
my dmesg.log. They can also be viewed on github:

https://gist.github.com/duxsco/55b31a5e73fd2ef498f0ae96d9152f99

https://gist.github.com/duxsco/b5ee79e51f68d50240b2bc5b6a7fd82c

This makes it impossible to comment on your description or logs inline.

Anyway, the usual primary suspect is duplicated received UUID. Show
"btrfs subvolume show snapshot" on both source and destination systems
for each involved snapshot.