good day but I'm gonna drop the rack deads, my back just really can't handle them right now

DC Pullups-100lbs of assistance and got 31 reps RP'd, so I did 15lbs more than last week and hit my rep target. Also did a 35 second static.
rack deads-365*4, 225*12. Lots of pain in the low back, sometimes it feels like the siatic nerve other times it's more along the base of the spine, today it was like both at once, not good. I could suck it up and keep going with them but I don't know if it's worth it at this point.
2 handed Hammer Curl-50*32RP with a 27 second static, 10lbs increase.
Wrist Curl-80*30RP, forearms were really pumped when I was done.
stretches and a little bit of the old abs just for the hell of it.