3.38. Why am I receiving moderation requests that read ...mailing list has -1 request(s) waiting... ?
A newly created mailman 2.1.5 list will email bogus moderator requests until a genuine one has been handled. The email posted says:
The cause is that request.pck is either missing or it doesn't contain the version info.
The workaround is simply to create a real moderation request (which automatically creates a request.pck) or to copy a valid request.pck file over from another list.
There's also a patch available at sourceforge, which should fix this. http://sourceforge.net/tracker/index.php?func=detail&aid=970383&group_id=103&atid=300103
You can also fix it by hand:
If you simply go to the admindb link (WEBADDRESS in the above example) and log in, that should fix it.
Converted from the Mailman FAQ Wizard
This is one of many Frequently Asked Questions.