diff --git a/changes/8268.bugfix b/changes/8268.bugfix
new file mode 100644
index 00000000000..0f835e9bc5b
--- /dev/null
+++ b/changes/8268.bugfix
@@ -0,0 +1 @@
+Set license model `od_conformance` and `osd_conformance` attributes' default values to `False` to prevent errors.
diff --git a/ckan/model/license.py b/ckan/model/license.py
index edd8b3be6c1..6dd5af25c4c 100644
--- a/ckan/model/license.py
+++ b/ckan/model/license.py
@@ -18,6 +18,11 @@
 class License():
     """Domain object for a license."""
 
+    default_values = {
+        'od_conformance': False,
+        'osd_conformance': False,
+    }
+
     def __init__(self, data: dict[str, Any]) -> None:
         self._data = data
         for (key, value) in self._data.items():
@@ -31,6 +36,9 @@ def __init__(self, data: dict[str, Any]) -> None:
                 self._data[key] = value
             elif isinstance(value, str):
                 self._data[key] = value
+        for (key, value) in self.default_values.items():
+            if key not in self._data:
+                self._data[key] = value
 
     def __getattr__(self, name: str) -> Any:
         try: