ActiveModel::Name#partial_path is deprecated

Hej, co oznacza ten blad przy generowaniu migracji? Mam ruby 1.9.3 i rails 3.2.6.

{:partial_path=>“ActiveModel::Name#partial_path is deprecated. Call #to_partial_path on model instances directly instead.”} is not a symbol

Tasks: TOP => db:migrate => db:load_config
(See full trace by running task with --trace)

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