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Error (Infragistics.Web.UI.GridControls.GridFieldCollection ViewState is corrupted) in webhierarchicaldatagrid


We have some editable webhierarchicaldatagrid as shown below,

We need to save the changes after editing some cells by pressing the save button shown below,

But unfortunately we are receiving (Infragistics.Web.UI.GridControls.GridFieldCollection ViewState is corrupted) error as shown below before entering the event of the save button.