When generate the xlsx report from Jasper using Spring boot. Report generated successfully but getting some warning messages. In the report design we have not used any group by functions and any other functions. Report is created by drag and drop the field as a simple report. Please find the below warning content We found a problem with some content in "test.xlsx". Do you want us to try to recover as much as we can? If you trust the source of this workbook, click Yes. After click yes, getting the below Excel completed file level validation and repair. Some parts of this workbook may have been repaired or discarded. Please suggest the steps to resolve the warning issue.