diff --git a/parsers/caves.py b/parsers/caves.py
index baea009..f1c8c4f 100644
--- a/parsers/caves.py
+++ b/parsers/caves.py
@@ -684,16 +684,21 @@ def read_cave(filename, cave=None):
     def check_slug(areacode, kataster_number, unofficial_number, url):
         if kataster_number:
             if slug == f"{areacode}-{kataster_number}":
-                return
-            message = f" ! Cave Slug mismatch (kataster): '{slug}' != '{areacode}-{kataster_number}' {url=} in file {filename}"
+                return slug
+            message = f" ! Cave Slug mismatch (kataster): '{slug}' != '{areacode}-{kataster_number}' {url=} in file {filename}. Adjusting.."
+            correctslug = f"{areacode}-{kataster_number}"
         else:
             if slug == f"{areacode}-{unofficial_number}":
-                return
-            message = f" ! Cave Slug mismatch (unofficial): '{slug}' != '{areacode}-{unofficial_number}' {url=} in file {filename}"
+                return slug
             if slug.lower() == f"{areacode}-{unofficial_number.lower()}":
                 message = f" ! Cave Slug capitalisation incorrect (unofficial): '{slug}' != '{areacode}-{unofficial_number}' {url=} in file {filename}"
+                correctslug = slug.lower()
+            else:
+                message = f" ! Cave Slug mismatch (unofficial): '{slug}' != '{areacode}-{unofficial_number}' {url=} in file {filename}"
+                correctslug = slug # hack to stopit crashing
         DataIssue.objects.create(parser="caves", message=message, url=f"{cave.slug}_cave_edit/")
         print(message)
+        return correctslug
          
     global entrances_xslug
     global caves_xslug
@@ -809,7 +814,8 @@ def read_cave(filename, cave=None):
     cave.url = f"{cave.areacode}/{cave.number()}/{cave.number()}.html"
     check_directory(cave.areacode, cave.number(), cave.url, cave)
 
-    check_slug(cave.areacode,cave.kataster_number, cave.unofficial_number, cave.url)
+    # This next line has no effect because the cave slug is not actually a field on the Cave object so we can't fix it here. to-do.
+    slug = check_slug(cave.areacode,cave.kataster_number, cave.unofficial_number, cave.url)
                
     entrances = getXML(cavecontents, "entrance", context=context)
     do_entrances()