Fixed the deletion of issue slips with serial numbers in a warehouse using FIFO valuation – an issue slip can now be deleted again, and deleting an invoice created from an issue slip no longer removes the serial number from the issue slip.

Fixed the import of a user report with attachments via API v2 (Import XML in the web client), which ended with the error report_hlavni_report_constraint – a newly created record no longer takes over lastUpdate from the imported XML, and its modification time is now set according to the moment of import.

Updated the log4j library to version 2.26.1 because of vulnerability CVE-2026-49844, which could not be exploited in Flexi. To stop security scanners from reporting the finding, you need to run the new installer on your workstations.