/opt/mastodon/lib/mastodon/cli_helper.rb:28:in `parallelize_with_progress': can't modify frozen Hash: {:adapter=>"postgresql", :pool=>20, :timeout=>5000, :encoding=>"unicode", :sslmode=>"prefer", :database=>"mastodon_db", :username=>"dbusername", :password=>"dbpassword", :host=>"foundation-db", :port=>5432, :prepared_statements=>true} (FrozenError)
@noellabo @yakumo main 追従またはこちら ( https://github.com/tootsuite/mastodon/pull/15983 ) の取り込みで直ると思います