This plugin will take all resource and archival_object records and glue all their instances together.
EAD does not have the concept of an instance, and for awhile the EAD importer took container tags in the EAD and created multiple instances, instead of a single instance with multiple container values.
Download and unpack the plugin to your ArchivesSpace plugins directory Add "instance_joiner" to your config/config.rb AppConfig[:plugins] list Restart ArchivesSpace
Logged in as a repository administrator, go to Plugins --> Instance Joiner. Click submit and all the records in the selected repository will be modified.