Playa comes with a tool for converting Relationship fields over to it.
Note: Do not simply change your Relationship field’s Field Type setting over to “Playa”. You will lose all of your existing relationships.
Here’s how to do it:
- Go to Add-Ons → Fieldtypes → Playa
- Choose which fields you wish to convert in the “Convert Relationship fields?” setting, and click “Submit”
- Update your templates to use Playa’s template tags