Error in Document Understanding ( Data Label )

[MD_Farhan1 (MD Farhan)]

Hi,
I want to Extract Airway Bill data using Document Understanding . but i got Error in Dataset and Data Labelling Below i upload Screen short For the Ref.

[mukesh.singh]

You need to use more than 30+ input files for training

[MD_Farhan1 (MD Farhan)]

but i need only 15 to 20 fields. i trained one document to apply in all document is possible