Retrieve values for Property from allowed values other property

Hello,

We would like to use the allowed values list of a property in a new property. We can't just make a copy, because we want to minimize the maintenance on the allowed values list.

For example we have a property called Subject with values A,B,C. We now created a new property called Subject 1 and we want to use the values from property Subject. Just copying the allowed values in the new property is not an option, nor is the checkbox multivalued.

Does anyone know how we can establish this?

Kind regards,

Joost