I'm working on a project regarding the coastline of Tampa Bay and over a long period I've edited a 2004 snapshot of the coastline from a line shapefile into a polygon shapefile representing the coastline in 1940.
Last night I had to make an inset map of the area and thought it would look better if I removed the rivers. To do that I copied the shapefile to
C:\Users\me\Downloads (working folder is
D:\OneDrive\FLGIS\Boundaries) and removed the rivers of the original shapefile in ArcGIS Pro, which meant the edits were irreversible (I couldn't copy the file within the map for some reason).
Now I need the copied, unedited shapefile, so I deleted the original shapefile and moved the copy back to its place. Now I can't add it to any GIS program nor can I replace the data source of the original file. In QGIS it says
"invalid data source" and ArcGIS Pro says
"layer's data source could not be changed" or
"failed to add data."
The last backup was made at the end of July and I have modified it slightly and backed up more recent variations (e.g. as a line shapefile or a polygon shapefile with lakes), so it's not the end of the world. However, I would like to know what exactly corrupted it and how it is corrupted and whether it can be fixed. The linked ZIP includes the shapefile files (coast_1940) as well as the metadata for the original shapefile (coast_feb04).