Devise throws an error during registration, what could be the problem?

Question

Ruby on Rails

Did "rake db:migrate:reset" once because of wrong migration. I tried to reinstall the gem, but the result is the same, everything was fine before the error with the database.
What can I do, please tell me :)

Answer 1

is bcrypt worth it?
try
rake db:drop; rake db:create; rake db:migrate

Answer 2

show model code and schema.rb .
try deleting schema.rb and re-run the migrations.