Before updating scaffolding from new DB schema, try creating a table for your model

What does the message "error Before updating scaffolding from new DB
schema, try creating a table for your model (Legacy)" mean? My googling
shows that others have received similar messages, but it's not clear to
me the import of the message.

Here's what I'm doing which generates this error:

[thufir@localhost ~]$ mysql -u feeds -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 21 to server version: 5.0.27\

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

use legacy;

Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed