removing SafariTabs* just breakes function of pinned tabs, and it won't save state of pinned tabs.
for permanent fix, I tried to remove: (It will clear browsing history, cookie, settings like default search engine without keychain)
~ means your home folder, Press Command + Shift + . on Finder to toggle visibility of hidden file Like Library folder.
remove ~/Library/Safari folder and
remove ~/Library/SafariSandboxBroker folder and
remove ~/Library/SafariSafeBrowsing folder and
remove ~/Library/Containers/com.apple.Safari folder and
remove ~/Library/Containers/com.apple.Safari.CacheDeleteExtension folder and
remove ~/Library/Application Scripts/com.apple.Safari folder and
remove ~/Library/Application Scripts/com.apple.Safari.CacheDeleteExtension folder and
remove ~/Library/Caches/com.apple.Safari folder and
remove ~/Library/Caches/com.apple.Safari.SafeBrowsing folder and
remove ~/Library/SyncedPreferences/com.apple.Safari-com.apple.Safari.UserRequests.plist file and
remove ~/Library/SyncedPreferences/com.apple.Safari.plist file and
remove ~/Library/Preferences/com.apple.Safari.SafeBrowsing.plist file and
remove ~/Library/Preferences/com.apple.Safari.SandboxBroker.plist file.
and reboot then it will works again.