When accessing IMAP mail (with nnimap) in GNUS, the Summary buffer often lists messages or that are actually no longer present in the group.
Selecting any of these messages/articles results in an 'Article canceled or expired' error message. Quiting and restarting gnus doesn't change this (or refreshing with C-u M-g).
I can remove these articles from the Summary list by quiting gnus, and removing the ~/News directory and .newsrc.eld file, and then restarting gnus.
Is there anyway of getting the same result without reverting to deleting the files and directories?