ZFS replication failing after upgrading from SCALE-23.10.2 to ElectricEel-24.10.0.2

Hello,
yesterday I’ve successully upgraded one of my machines from 23.10.2 to 24.10.0.2 (stepping through 24.04 of course) and everything went smoothly.
I only have the standard Nextcloud app which was successully upgraded.

I have a “fast” pool which I replicate locally to a “dump” pool and remotely to another NAS (Still on 23.10). They both stopped working and I don’t know why.
This is the local one:


Here are the datasets:

And I’m getting the error:

Replication “fast - dump/backups/micro7/replica-fast” failed: Last full ZFS replication failed to transfer all the children of the snapshot fast@auto-2024-11-15_00-00. The snapshot dump/backups/micro7/replica-fast/ix-apps/app_mounts/nextcloud/data@auto-2024-11-15_00-00 was not transferred. Please run zfs destroy -r dump/backups/micro7/replica-fast@auto-2024-11-15_00-00 on the target system and run replication again…

I tried to delete the target snapshot but the error is now on the snapshot of the previous day if I run it again. I deleted 4 of 5 snapshot but the error simply goes back to that snap.

Same error on the remot one:

Replication “fast - localbackups/replicas/replica-micro7-fast” failed: Last full ZFS replication failed to transfer all the children of the snapshot fast@auto-2024-11-20_00-00. The snapshot localbackups/replicas/replica-micro7-fast/ix-apps/app_mounts/nextcloud/data@auto-2024-11-20_00-00 was not transferred. Please run zfs destroy -r localbackups/replicas/replica-micro7-fast@auto-2024-11-20_00-00 on the target system and run replication again…

What am I missing?

The only similar post that I found is Replaceing app brakes replication task? but I don’t want to delete everything and start from scratch

thanks

Hello, has anyone experienced this issues? or is there anything I can do to better understand the problem? thanks