When generating a new document for the second time, why open the path of the picture in the last generated document

[YaoDixing1026]

docxPath: \tmp\info28ee4e3e603c97fb083cbc8e0e3b6797.docx
it include 2 images
images path:
\tmp\idBack28ee4e3e603c97fb083cbc8e0e3b6797.png
\tmp\idJust28ee4e3e603c97fb083cbc8e0e3b6797.png

generate the docx successful no problem

and then I remove all old files in /tmp

new docxPath: \tmp\info79550af2603cb53e07b939b8168b458b.docx
new image path include:
\tmp\idBack79550af2603cb53e07b939b8168b458b.png
\tmp\idJust79550af2603cb53e07b939b8168b458b.png

call method generate() with the new path

but given me this:
Error: ENOENT: no such file or directory, open 'C:\tmp\idJust28ee4e3e603c97fb083cbc8e0e3b6797.png'

The image path in the new document is new. Why open the previously deleted image path？