Our Tenants are Going through a Divorce and Want to Remove the Husband's Name From the Lease.

We are landlords in Michigan. Our tenants are going through a divorce and want to take his name off the lease. He has forcefully entered the home and done damage to it on two occasions. He says she is a drug addict. She says he's crazy and mean. I just want my rent on time. Do I have to take him off the lease? Now or after the divorce is final? Should I? What are the pros and cons? If I take him off should I write a new lease? Can I legally ask for a guarantor if I do? Help!!!