I was working on topic 1 which wasn't the most interesting topic, but my prof was great. Then prof 2 suggested that I work with him on topic 2 on the condition that I stop topic 1 as he wants full dedication. I didn't wanna disappoint and ruin my reln with prof 1 and leave my old project incompleete, so I told him that my project will have the old and new topic but I'd be finishing the old part soon to work with prof 2. He heard it and is probably angry, and won't respond to my emails.
How do I deal with this?