How can I fix a corrupted Sent folder

Shortly after my most recent update, my Sent folder became corrupted. Rather than containing recently sent messages, it contained older messages from another folder, and when I send a new message now, it is not added to the Sent folder. When I tried to send a message, I received an error notification indicating that the message could not be archived because the folder did not have enough memory. I deleted everything from the Sent folder and then compressed it, but that did not solve the issue. I then closed Thunderbird, manually deleted the Sent folder from Mail/Local Folders; the Sent file was regenerated when I started the program again but with the same issue. I then backed up my profile, removed Thunderbird and reinstalled it, and then copied my profile over without the Sent folder. But when I opened the program, the issue still persisted. The folder properties for the Sent folder indicates: Name: Sent Location: mailbox://nobody@Local Folders/Out -- 148 November-Dec 2022 The location is obviously incorrect as it does not point to the Sent folder, but rather to another folder I use to store older message. I see no way to change the location, and the Repair Folder option does not solve the issue. I would be very grateful for any suggestions.