I have a pbix file that successfully loaded data and everything worked. The next day I tried refreshing it, and got this peculiar error:
Column ‘MAMUserPercent’ in Table ‘CapacityReport_ASUDeviceRatios’ contains a duplicate value ‘0.5’ and this is not allowed for columns on the one side of a many-to-one relationship or for columns that are used as the primary key of a table.
I could not find any reason for the error, either in the table itself or in any references to the table. Since I was out of ideas, I duplicated the table, changed all references to the new copy, and deleted the old one, and the refresh then failed with a similar error but on a different table:
Column ‘Total Device Check-ins Per Day’ in Table ‘CapacityReport_MonthlyCapacity’ contains blank values and this is not allowed for columns on the one side of a many-to-one relationship or for columns that are used as the primary key of a table.
I repeated the process and the next refresh succeeded. I'm worried that I will continue to hit this randomly when i refresh. Any ideas on what's going on?