My boyfriend broke my promise, I dont know how I should feel?

My boyfriend and I are in a LDR due to work/college reasons seperating us. We have phone sex a lot and the first time we done it, I had asked him to promise me to never record our phone sex conversation. He agreed.

Three to four months later we were having phone sex and he screen shot me a sex pose, and I saw at the bottom of the screen a recording. I asked about it, he gave me 2 differents answers. He admitted to recording but he said it was an accident.

Later he apologised and asked if he could. I declined. He explained that the screen recorder only records 1 app. I tried it myself and it records anything on the screen and any audio.

I am a bit mad he lied to me and then tried to give me a white lie. Im not even sure how I should feel. I dont want to dump him but him lying and breaking a promise is a red flag for me.
My boyfriend broke my promise, I dont know how I should feel?
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