On Umbraco 7 we used to use Arknu Relations package to link attributes in the back end. For example in a Person document type - Jane Smith - there was a Services node picker. If we pick say Education here, then go to the Services document there is a Person node picker here and Jane Smith is already selected. So the relationships were in sync in the back end. Now on Umbraco 10 the Arknu relations are not available. I have set up all the code so the links appear on the front end but the back end is not in sync. Is there any package which would do like the Arknu pacakage did? Or am I looking at creating custom property editors?