rake acts_as_taggable_on_engine:install:migrations doesn't work with rails 5.1

[spnkr]

1. need to inherit from ActiveRecord::Migration[5.1], not ActiveRecord::Migration
2. the indexes it adds in these auto generated migrations have duplicates, and so rake db:migrate fails

[kuwze]

I got rid of this by having this in my Gemfile:

gem 'acts-as-taggable-on', '~> 5.0'

and deleting vendor/bundle and rerunning bundle

Also I deleted the migration files the broken version generated and regenerated them (not sure if that was necessary).

[lightbe]

I was having the same problem because it installed version 4. I reinstalled version 5 and got my databases created successfully.