renewing certificate with a 1024 bit key

Certificate noob here. I’m using snow leopard server and It’s time to renew our wildcard cert. and comodo now requires CSRs to be 2048 bits. The key for our existing cert is 1024. Will I have to create a completely new certificate or is there a way to create an acceptable CSR from the existing cert?

You will need to create a new key and CSR with a key bit length of 2048.