Yes, you can merge corporate MR with personal MR. Only catch is you will end up paying another $75 for merging personal MR with corporate MR. So, essentially you would end up paying $150 per year ($75 for corporate MR + $75 for linking personal MR with corporate MR OR the other way round).

I ran into this situation a month ago. I called personal MR service line and ranted about it twice in two different calls and said it doesn't make sense to pay an additional $75 when I am already paying a personal card annual fee.
They gave me a $50 statement credit. So, I ended up paying $25 for linking my corporate MR with personal MR.