PowerApps: Check your Dynamics 365 Option Set !
When using Dynamics 365 datasource in PowerApps, I've got this error that I want to share with you :
{"status":500,"message": "An item with the same key has already been added.","source":"https://www.dhirubhai.net/redir/invalid-link-page?url=127%2e0%2e0%2e1"}
If you get this error, check Dynamics 365 fields names, Option Set and also Global Option Set used in the Entity you are calling in PowerApps. Generally, you have a duplicate Names in the Option Set.
It took us some time with my colleague Nabil and PowerApps team to find the source error but help us understand lot of aspects of the Dynamics 365 datasource interactions in PowerApps.
It's really simple to resolve it by renaming the Option Set captions. More details in this post:
Knowledge rests not upon truth alone, but upon error also. Carl Jung