Stitch is unable to quickly delete extra pages

There are too many pages in my project, over a hundred of them, and many are revised or final versions. I asked it to delete all the pages except for the final versions, and it replied that the deletion was complete, but in reality, nothing was deleted. Repeating this multiple times still didn’t work. MCP is also unable to perform the deletion, which is very frustrating. I hope you can look into this issue. Thank you.