Revize 6f4a5f24

Re #8476 - Repository bugfix.

src/dao/certificate_repository.py

@@ -86 +86 @@
             self.cursor.execute(sql, values)
             certificate_row = self.cursor.fetchone()
 
+            if certificate_row is None:
+                return None
+
             sql = (f"SELECT * FROM {TAB_CERTIFICATE_USAGES} "
                    f"WHERE {COL_CERTIFICATE_ID} = ?")
             self.cursor.execute(sql, values)