I have a similar problem. I can delete any book using Calibre, but if I convert a book to another format then I can delete neither of them. The error message is calibre, version 6.7.0
ERROR: Unhandled exception: <b>AttributeError</b>:'DeleteAction' object has no attribute '_remove_format_from_ids'
calibre 6.7 embedded-python: True
Windows-10-10.0.19044-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.19044')
Python 3.10.1
Windows: ('10', '10.0.19044', 'SP0', 'Multiprocessor Free')
Interface language: en_GB
Successfully initialized third party plugins: Quality Check (1, 12, 0) && View Manager (1, 9, 0)
Traceback (most recent call last):
File "calibre\gui2\actions\delete.py", line 189, in remove_format_by_id
AttributeError: 'DeleteAction' object has no attribute '_remove_format_from_ids'
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