Your ATD data disk use, previously reached 75%. Reaching this threshold triggers an internal disk cleaning task to delete the analysis reports.
The disk cleaning task maintains available disk space for new samples. The task deletes old analysis reports, including HTML format, original sample, and complete results and old log files from the disk.

If the analysis report is deleted, the GUI still shows the past scan results in the Analysis Reports table screen but its corresponding original summary reports in HTML, PDF, and other formats become unavailable.
To report this situation, the ATD renders Severity: -2, and Description: Report not available - Analysis incomplete, to the scanned sample in the HTML analysis summary report.