"Notes error: database already contains a document with this id(UNID)" When Attempting to Import Holidays

I have a user receiving the error message above when they try to import holidays. I also have been experiencing this problem. I deleted all holidays and verified they are gone from my calendar and meetings views. I then try to import the holidays and I receive the error message again. What’s really strange is it almost looks as if it tried to import the holidays because it shows Saint Patrick’s day twice on my calendar for every year beginning in 1999. I delete them again and try to reimport and I receive the same error message. I searched on this forum and couldn’t find an answer. Does anyone know? I thought that I had read ages ago that this problem with holidays was fixed in release 6.

Subject: “Notes error: database already contains a document with this id(UNID)” When Attempting to Import Holidays

Check in the NAB for duplicates of holiday entries (or replication conflicts) for the selected country.