Sorry, database error detected.
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select T.item_id, T.parent_item_id, T.item_name, D.d_filename template_file from ssp_Templates T, ssp_TemplatesCache TC left join ssp_Designs D on D.design_id= T.design_id where T.item_id= TC.parent_item_id and TC.item_id= 163

Unknown column 'T.design_id' in 'on clause'