Google Calendar ICS import error: “Failed to import events: Could not upload your events because you do not have sufficient access on the target calendar”

A couple of days ago I ran into the above error when I tried importing my ICS file into Google Calendar. A quick Bing search turned up a few results, and after some digging I found the root cause – UID collision (thanks Nick VE!).  Basically you need to delete all UIDs from the file and let Google assign new ones. There are many ways to do this, but Nick suggests a nice simple approach:

1. Install Notepad++
2. Hit Ctrl+O and open the ICS file
3. Hit Ctrl+F and click the Mark tab
4. In the Find what field write UID
5. Tick Bookmark line
6. Press Mark All
7. Menu Bar -> Search -> Bookmark -> Remove Bookmarked Lines
8. Save the file and try importing again

Of course, this is only temporary until I move my calendar to Outlook.com.