https://bugs.documentfoundation.org/show_bug.cgi?id=173397
--- Comment #1 from Sergey <[email protected]> --- Created attachment 208361 --> https://bugs.documentfoundation.org/attachment.cgi?id=208361&action=edit Minimal XLSX reproducer with a lowercase threaded-comment GUID Sanitized minimal reproducer without private data. The source file opens normally. Open and save it as XLSX with LibreOffice 26.8.0.3; the resulting xl/comments1.xml contains a lowercase comment/@guid and openpyxl 3.1.5 rejects the saved file. The same parsing flow succeeds with LibreOffice 26.2.6.3. -- You are receiving this mail because: You are the assignee for the bug.
