Having error message

Hi im new to this and not know much.
my sytem that i use in my cafe decided to throw error message.
And i have no idea have to sort it out any help will be appreciated.
Recently i have added new products to my menu and i have selected which item needed to go to which printer.
And the next day i get an error message on the screen everytime we selet pay and choose cash. card option we dont get the error message

Ensure that the selected printer in the print job exists on all terminals.

I find it easier to manage when all printers are named the same (e.g. printer named “Ticket Printer” on each terminal even if it’s connected via USB).