Good evening everyone,
I've a problem in configuring Syncthing under Windows 11 Pro. I installed the software on two PCs in the LAN. Each PC sees the other in the configuration GUI, but synchronization stops after a short while.
I see this message in the logs:"2025-10-06 19:53:06 WRN Failed to sync (path="Dati precedenti di Firefox\\uea2oa9a.default-release-1679994055012\\storage\\default\\https+++www.google.it\\ls\\data.sqlite" error="syncing: finishing: setting metadata: lookup user PC-*****\\******: No mapping between account names and security IDs was done." folder.label="Desktop HP" folder.id=********* folder.type=sendreceive log.pkg=model)".
On the other pc:"2025-10-06 19:56:49 WRN Failed to sync (path=Benvenuti-grazie-per.mp3 error="syncing: finishing: setting metadata: lookup user ******\\*******: No mapping between account names and security IDs was done." folder.label="Desktop HP" folder.id=********* folder.type=sendreceive log.pkg=model)
2025-10-06 19:56:49 INF Folder failed to sync, will be retried (wait=1h4m0s folder.label="Desktop HP" folder.id=********** folder.type=sendreceive log.pkg=model)
I've tried various solutions but can't seem to resolve them.
Suggestions?
Thank you very much.
Please try to reformat the post by surrounding only the code with ``` and not the whole thing. In the current form, it’s basically impossible to read, as you have to scroll sideways. 
1 Like
Turn off syncing ownership would be my guess
Hi Jakob,
thanks a lot! It works! As soon as I turn off syncing ownership all goes right. Thank you very much. Best reagrds
@RobertoSid I think you marked the wrong post as the solution.
Done, forgive me.
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