fix adding an existing language to a book

cps/web.py

@@ -580,24 +580,29 @@ def modify_database_object(input_elements, db_book_object, db_object, db_session
                 db_session.add(new_element)
                 db_book_object.append(new_element)
             else:
-                if db_type == 'custom' and db_element.value != add_element:
-                    new_element.value = add_element
-                    # new_element = db_element
-                elif db_type == 'languages' and db_element.lang_code != add_element:
-                    db_element.lang_code = add_element
-                    # new_element = db_element
-                elif db_type == 'series' and db_element.name != add_element:
-                    db_element.name = add_element # = add_element # new_element = db_object(add_element, add_element)
-                    db_element.sort = add_element
-                    # new_element = db_element
-                elif db_type == 'author' and db_element.name != add_element:
-                    db_element.name = add_element
-                    db_element.sort = add_element.replace('|', ',')
-                    # new_element = db_element
-                if db_type == 'publisher' and db_element.name != add_element:
-                    db_element.name = add_element
-                    db_element.sort = None
-                    # new_element = db_element
+                if db_type == 'custom':
+                    if db_element.value != add_element:
+                        new_element.value = add_element
+                        # new_element = db_element
+                elif db_type == 'languages':
+                    if db_element.lang_code != add_element:
+                        db_element.lang_code = add_element
+                        # new_element = db_element
+                elif db_type == 'series':
+                    if db_element.name != add_element:
+                        db_element.name = add_element # = add_element # new_element = db_object(add_element, add_element)
+                        db_element.sort = add_element
+                        # new_element = db_element
+                elif db_type == 'author':
+                    if db_element.name != add_element:
+                        db_element.name = add_element
+                        db_element.sort = add_element.replace('|', ',')
+                        # new_element = db_element
+                elif db_type == 'publisher':
+                    if db_element.name != add_element:
+                        db_element.name = add_element
+                        db_element.sort = None
+                        # new_element = db_element
                 elif db_element.name != add_element:
                     db_element.name = add_element
                     # new_element = db_element