How to Mark Message as Read

I have an InReach Mini that I have received hundreds of messages on.

But even though I have read them all it still shows I have 10 unread messages, and if I go into the messages it shows those 10 as new.

But they remain marked as new/unread even when I open and read the message.

I have done some research, but do not see how to mark these as read.

Any help?

Thanks - Steve.