Custom Object: Modify primary key

[AKlobnock]

Hello - I'm using a reverse ETL to create records and update hubspot from our postgres DB.  I have a custom object and we previously used the hubspotID as the unique identifier to identify records to either update.  Our process has changed and we no longer are storing the hubspotID in the custom object. 

Is there a way to edit the primary/secondary keys on a custom object?  I can use phone number the hubspotID, but would like to use the unique DB key and sync it with a data property in the object. 

ps: I'm not a developer so don't know how to do it in the dev environment.  I've tried tools in the marketplace like Lift or Easy Custom Object but the inputs never seem to take. 

[noahmckeon · Accepted solution]

Hey @AKlobnock ! Once you set the primary key, you're not able to change it without rebuilding the custom object.