Lost In The Art Studio

I'm an artist by trade and have a rather unique set of fetishes that tie directly into my creative side. A few years back, I found myself in a relationship with someone who was intrigued but cautious about my more adventurous kinks. We had agreed on exploring some light bondage and spanking as long as it remained consensual and safe. This worked well for the first month or two until one day, everything changed. We were deep into planning our next project together at the studio when I suggested we take a break and have a little fun in the back room which had an old couch and some comfortable cushions. He seemed hesitant but agreed to give it a try. As soon as we started exploring, his resistance quickly melted away under my gentle persuasion. Things got really heated pretty fast, way faster than I expected! In one moment of intense passion, I accidentally broke the rules that had kept us grounded and safe: I went beyond light spanking into more vigorous discipline without asking explicitly for permission. He didn't fight back but there was a tension in his body that told me something was off. I pulled away immediately after realizing what I'd done wrong, that moment of going too far, even if unintentional, still lingers with me heavily now as one of the biggest regrets of our relationship. The next day, he suggested we should take a break and reconsider everything we were trying to do. Looking back, it's clear my eagerness led us down an unpredictable path. So here I am today, still questioning whether I could have handled that moment differently, would it be better for me to stay away from anything more than light play altogether or is there a middle ground somewhere? What would you all advise in this situation?