Ford Sync 3.4 Update

Normally it’s not required, but since you are running 22251 I assume your rwdata partition is full and maybe a master reset won’t work straight away.

Read this guide → APIM Sync Settings Not Saving, VER_ERR08 Errors, Cannot Perform Master Reset or Upgrades/Updates (Solved) , all known methods to resolve the issue (if present) are located there.