In certain older versions of Syslog-ng Store Box, there may be, under certain circumstances, a large file called 'service.core.svg' in the debug bundle.
This file could be up to 20 GB in size.
This file is generated on demand for inclusion in the debug bundle to provide systemd related diagnostic information. After the bundle has been compressed, this file is automatically deleted from the SSB. In most cases it is not required for troubleshooting and may be deleted safely from the debug bundle.
This issue can be resolved by upgrading to the latest version of SSB.