TestStand Custom steps Down conversion: Developed in TS2017 Need to use with TS2016

I am using TestStand 2017 and created custom step types. I need to share these step types with my team mates who are using TestStand 2016.

When I add Step type in TS2016 (which is saved in TS2017) I am getting error -17339 (Unable to read object)

Please let me know how to down convert custom step types