How to manage work issue/stress

Hello, In my line of work (Real Estate Agent) occurrences/issues arise that are highly stressful, I am struggling with not owning or making that my own personal stress, and causing anxiety in my life. As an example; 2 weeks prior to transaction closing (client taking possession of a new home) issue arises that jeopardizes the deal closing. My role is to fix the issue if possible. The stress associated is very high and I take it all on. I know colleagues who are much more detached and don’t stress the way I do. How can I learn to detach the stress from my personal life?