a list "" * gives me this

* LIST (\HasChildren \UnMarked) "/" INBOX/2022-PERSONNEL/FOO2
* LIST (\HasNoChildren \UnMarked) "/" INBOX/2022-PERSONNEL/FOO2/test
* LIST (\Noselect \HasChildren) "/" INBOX/2022-PERSONNEL/FOO2/test
* LIST (\Noselect \HasNoChildren) "/" INBOX/2022-PERSONNEL/FOO2/test/Location

As you can see there is " noselect " and with Thunderbird this is in grey.. Due to a bad manipulation. I wanted to create a subfolder and I wrote  "FOO2/test" when FOO2 didn't exist yet

Now " test" is grey and I cannot place anything inside.. 

I didn't see this at first sight and I've placed important emails in it, that it didin't synch... and which  which seems to be lost :-(

a Repair didn't work out

How can I " revalidate " this folder ? without removing it ? ( hoping to get something in it )

Thanks