How to Track the count of error

Hello,

I am working on a project data quality report in Power BI. It basically checks the accuracy of all the project fields.I have created DAX formulas in a way that I can detect any changes in the fields and count the errors. However, there is no way to track these changes. Example a lead person has an error count of 100, but the next month it reduced to 50. I am unable to track the progress of the individuals. Right now I have to download the file every month and check for the error count for individuals using pivot.

Thanks