Public key already in use. Please add a unique key.

I am integrating Box with Bubble.io , I have created a free personal account in Box.

I created an app and used the JWT from Bubble to create an key.

Since I could not find an enterprsie ID, I deleted the app and started again.

I then created a new app and when I use the same JWT from Bubble., I get error message “Public key already in use. Please add a unique key.”

Unfortunately its not possible to generate a new JWT form Bubble.

Please advise :

1. 
   

   How to get an enterprise ID (is it restricted on personal plans?)

   
   


2. 
   

   How to resolve the error "Public key already in use. Please add a unique key".
   
   Best Regards