Attendee temporary contacts can't be converted

[BeverlyMIS]

I have an event with registrants and attendees. I have three attendess that show up with temporary contacts, but when I try to process them I get this message:
Error: This record is already processed or deleted.

I went into C&P Settings, Maintenance and deleted C&P information, then went to Connect to Post to Salesforce. It posed the Registration, but the Attendee records are still showing that error. I currently have six attendee records that are doing this. All the rest have worked fine.

The company is 00D15000000Eh2p and I have granted login access.

The one that I deleted and re-posted has the Registration under Rob Rawls and the Attendee that's not working is Kelly Polittes

[BeverlyMIS]

Sorry - one mor thing. Martin Duggan is the other attendee on that registration and that one won't process, either.

[CnP.Support]

Good day Bev,

Please check it now. We fixed the issue in your instance.

Let us know if we can be of more assistance.

[BeverlyMIS]

I actually fixed all of these by hand over the weekend. Can you tell me what the issue was so I know what to look for it it occurs again?