Hi Manimaran
Please check and see if it is a custom column created in webdynpro component /SAPSRM/CL_CH_WD_DOM_SOCO_GAF2 and see if there is any customization around it
Also check the customization in step 1 in webdynpro /SAPSRM/CL_CH_WD_DOM_SOCO_GAF1 if any logic written to populated the values in the 1st step
Regards
Vinita