diff --git a/plugins/VersionUpgrade/VersionUpgrade43to44/VersionUpgrade43to44.py b/plugins/VersionUpgrade/VersionUpgrade43to44/VersionUpgrade43to44.py
index a96b38902d..43fae0b472 100644
--- a/plugins/VersionUpgrade/VersionUpgrade43to44/VersionUpgrade43to44.py
+++ b/plugins/VersionUpgrade/VersionUpgrade43to44/VersionUpgrade43to44.py
@@ -54,7 +54,8 @@ class VersionUpgrade43to44(VersionUpgrade):
         parser["metadata"]["setting_version"] = "10"
 
         # We should only have 6 levels when we start.
-        assert "7" not in parser["containers"]
+        if "7" in parser["containers"]:
+            return ([], [])
 
         # We added the intent container in Cura 4.4. This means that all other containers move one step down.
         parser["containers"]["7"] = parser["containers"]["6"]
@@ -66,4 +67,4 @@ class VersionUpgrade43to44(VersionUpgrade):
 
         result = io.StringIO()
         parser.write(result)
-        return [filename], [result.getvalue()]
\ No newline at end of file
+        return [filename], [result.getvalue()]