Error while adding new print format : Atribute error: 'print format object has no attribute absolute_value'

While trying to change print format, when i try to select the print format ,i get an error
Server error
AttributeError: ‘PrintFormat’ object has no attribute ‘absolute_value’ and couldnt select the new format

Is it a custom print format?

Check for errors in the console.

it is showing lot of css file missing . our system is live and there is data ,so i am worried if i try any resett or clear cache or upgrade will it be stuck and not able to use erpnext . what is safe and easy way to fix this without disrupting the current built

This had the solution -