Idoc's - Mass Change

I am looking for a way to change the bill of lading (BOLNR) in field E1EDL20 in multiple idocs in one go. Currently these are processed individually and very time consuming. Is there a transaction that can be used to do this?

Example;

Idoc for Bill of lading: GB1111111111

Should be GB2222222222

We have 50 idoc's rather than going into each E1EDL20 and changing the BOLNR can all 50 be selected and changed in one?

Thank you for any help or advise