Cannot delete pages

Hi,I try to delete some archived event pages or the whole folder but got @Failed to delete the page: [DataConnection.HandleError]@ error with @Caused exception: Invalid column name@ in the end of error message.The column caused exception probably is the column added recently for some new functions. But these pages I want to delete was years old. So what's the best way to delete those old pages? Don't want to keep thousands of old event pages keep accumulating in CMS tree.We are on Kentico 11 portal engine.Thanks, Wei Wang