I export a book with images and import to another Spreadsheet 2nd times, it throws
- visit zss.test project's export.zul
- or attached source codes (zul, excel file, java), or run zss.test project's ExportTest
- click "input pictures" button
- click "Export to destination Spreadsheet"
- click "Export to destination Spreadsheet" 2nd time
No error occurs.
the exception described in problem description is thrown.
If you use "Insert picture" to insert picture and import the file 2 times, the same exception is also thrown.