Deadlift form reset on SSLP

I’ve been on the SSLP for almost 3 months and up to 315 x 5 on the deadlift. I noticed recently that my back gets heavily rounded for basically anything remotely heavy.

My question is: If I do a complete form reset on my deadlift to 225, how should I address the programming? I’ve been alternating power cleans (+ chin-ups) and deadlifts for about a month on the advanced novice program.

Would it be alright to focus on only deadlifts at the end of my sessions to get my numbers back to where they used to be with correct form?

I would back off ~20% from 315 to 245-255 and do 5 perfect reps there. That will be sufficient stress to likely drive adaptation to go up in weight the next deadlift session.