Sometimes photographs come in the permissions queue that still have copyright metadata attached to them. As the copyright holder is releasing them under a free license, the "© Northwind Traders 2018" tag is inaccurate.
It's easy to remove with the exiftool Perl script:
exiftool -copyright= foo.png will strip it entirely; or a fancier example to replace it:
./exiftool -copyright="This work is licensed under the Creative Commons Attribution 3.0 Unported License. \
To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or send a \
letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA." \
The amended file can then be simply uploaded in place of the old one.