I’ve been unable to start Syncthing (SyncTrazor ver 2.1) for a few weeks and the logs give me this error “2026-07-22 08:43:39 ERR Failed to initialize config (error=“config file version (52) is newer than supported version (51); if this is expected, use --allow-newer-config to override” log.pkg=main)”
I don’t recall upgrading anything, so I’ve no idea why this is happening. I know it gives an explanation and a solution, but I don’t know how to implement it.
The error means that your syncthing version was unexpectedly downgraded. Something must have changed on your system for this to happen.
This used to be a common problem for SyncTrayzor v1. It happened when you uninstall and then re-install SyncTrayzor again. SyncTrayzor v2 has multiple safeguards in place which should prevent this problem, but certain unknown edge cases apparently still trigger this.