Write Protection on Markups

Hello everyone,
unfortunately, I only started using Zotero when I had already read and marked up a lot of PDFs. I have now transferred them to Zotero with ZotFile and would like to change some of my markups or comment on them. Unfortunately, all the markups of the PDFs that I imported with the help of ZotFile habe a write protection. Does anyone know how I can change the write protection?
Thank you!
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