I've just logged in for the first time since today's maintenance and it appears there is a bug with the re-calibration library. My library show's that I currently have 14% Max Pistol Damage, however prior to update I had 15% in my library. I tried donating a max damage pistol that I didn't need to see if that fixed it, but it still wouldn't allow me to donate it. I've attached a screenshot of my current library value and a screenshot of my orbit which show's that I'd already rolled it to 15% Pistol Damage. I've spoke to other members of my clan and theirs are all showing 14% too.

Hello Agents,
Thanks for bringing this to our attention!
I already reported this issue and I can see that it's being investigated at the moment. Once we have an update, we are going to let everyone know.
Apologies for any inconvenience caused by this and if you have any additional questions, please let us know.