Task Parts 'Auto'

Hi Team,

On the Task parts screen under the spares management while mapping the parts with Model and task template, after saving 'Manual' comes up (Auto or Manual). I need to know the functionality of Auto is it we can do some data loading under this form in some automation way because here we have multiple models and against each model the parts are different so if I manually do the mapping then it will take time and can have scope for the manual errors also.

Also I see for some models Auto option is also populating, don't know how it is coming as manual because when we define the mapping only manual is selected under the field.