Migration uses ActiveRecord[6.1], creating incompatibility for Rails < 6.1

[kerchner]

bulkrax/db/migrate/20240307053156_add_index_to_metadata_bulkrax_identifier.rb

Line 1 in 1048453

class AddIndexToMetadataBulkraxIdentifier < ActiveRecord::Migration[6.1]

uses the ActiveRecord[6.1] method, but Bulkrax 8.0.0 should be compatible with Hyrax 2+ , and therefore Rails 5. Recommend downgrading this to match prior migrations, with ActiveRecord[5.2]