About Routing Error that occurred while creating the group function
In this image, the controller is groups.
In the image below, it is groups, but by setting it to groups here, a Routing Error occurred.
For example, when you make a mistake in the migration file with db: migrate like this
You can correct it by using db: rollback.
Also, the correction is completed with db: migrate.
With db: rollback, you can only go back one step.
db: rollback STEP = numbers
db: rollback STEP = You can go back to any place by using numbers.