IF NOT EXISTS (
    SELECT 1
    FROM sys.default_constraints df
    INNER JOIN sys.columns c 
        ON df.parent_object_id = c.object_id 
       AND df.parent_column_id = c.column_id
    WHERE OBJECT_NAME(df.parent_object_id) = 'tmpheadh'
      AND c.name = 'kind_Save'
)
ALTER TABLE tmpheadh
ADD CONSTRAINT DF_tmpheadh_kind_Save DEFAULT (0) FOR kind_Save