Propel is complaining about a table that doesn’t exist

When you change your mind about your schema, and rename or remove any of your tables from your schema.yml or xml files, you must manually remove all the related classes in the lib/ folder.

Symfony does not delete these unused files when you run a build, so they will stack up and cause Propel errors, for example when calling propel-dump-data.

Of course you can safely delete the lib/om and lib/map folders and run the build again, but you should manually delete the relevant files in /lib as there could be some user generated content in there also. These files are unlikely to cause any errors but might as well be deleted as part of your clean up since they are effectively useless if you have removed their referenced tables from the schema.