Reproduction of the problem

1. Run the dojo at https://dojo.telerik.com/@GaloisGirl/uBiLIbiP/3 . The state of the filter is "(ContactTitle Is equal to 'Sales Representative')", however, the ContactTitle field has been commented out from the dataSource schema.

Current behavior

The error "TypeError: Cannot read property 'type' of undefined" is thrown

Expected/desired behavior

Some error should be thrown, but one that the developer can recognize and handle appropriately.

Your example of persisting state saves it in localStorage. Say my user saves the state on Monday, and by Tuesday, a column is removed, renamed, has a different type... I need to handle that user's deprecated saved state.