PowerPivot – “Data overflow converting to the data type for table ‘68868d91-787b-49fa-bb65-fa1cc475c3c8’ column ‘Tape_Date’.”

If you’re trying to open a workbook from the SharePoint 2010 PowerPivot Gallery and you get this error: Data overflow converting to the data type for table ‘xxxxxxxxxxxxx’ column ‘Tape_Date’.”  This is Excel Services saying that the PowerPivot Workbook  is…