Synchronization error between ankidroid and AnkiDesktop

[berUser]

I am using Anki desktop Version 2.0.44 on Windows
I am using AnkiDroid (2.9 version mentionned in help)
Sync server is running on ubuntu on raspberry (anki 2.0.32 installed on server + anki-sync-server install procedure , ubuntu version Linux raspberry 4.4.38-v7)

When I do modification on AnkiDroid only, then doing sync, it is ok (files are pushed on server).
When I do modification on Anki Desktop only, then doing sync, it is ok (files are pushed on server).
The problem is when I do modification on Anki Desktop, then sync on Anki Desktop, then try to sync on AnkiDroid. I then get an error message, and I have to overwrite.
And conversly if I do modification on AnkiDroid, then sync on ankidroid, then try to sync on Anki desktop, I have to overwrite.

I am able to synchronize cards between my two devices, but I get error messages, and have to overwrite.
Do you have any idea of why it happens?
Is there any way to troubleshoot that?

Timezone seems ok on server.

Thanks

[gabriellluz]

I second that. I happens to me, too. I guess the owner actually abandoned this project.