Lighttable line through numbers?

In lighttable under collections what does it mean when a collection has the number of files with a line through it?

“The original film roll or folder name will be displayed with strikethrough formatting to emphasize that it can not be located.”

https://docs.darktable.org/usermanual/4.8/en/module-reference/utility-modules/shared/collections/

Thanks! I thought that was it. Strange thing is that it appeared that way after I re added a directory that I had used before. I could not get the strikethrough to go away until I manually deleted the xmp files and re added. I guess there may have been some xmp files for images that were physically deleted from the disk but still had an xmp file…

I get these strike throughs a lot when my external drives are not connected. They go away when my ext drives are reconnected.

If things have move then you can rightclick on the collection and select or maybe reselect the correct location and that should restore things…

image