Unable to delete Azure Function Keys in staging Deployment Slot?

Question

I have an Azure Function that uses prod and staging Deployment Slots. I was able to delete some Function Keys from the prod slot, but when I try to delete the same Function Keys in the staging slot, I get the error "Failed to delete ".

The same issue is now occurring when I want to create a new Function Key.

I tried stopping the function, still no go.

How do I delete a Function Key for a Function using a Deployment Slot?

Answer 1

2 Slots of my function App contains 2 function keys each (1 default created key and 1 custom function key created manually in both the slots with same key-value):

Production Slot:

Staging Slot:

Deleting the Function Keys

From Prod Slot:

From Staging slot:

For the above scenario, the traffic of prod slot is 100% and Staging slot is 0% in the Deployment Slots.

I think the cause might be your staging slot is having any traffic coming from staging slot functions. If yes, make the traffic to 0% and try deleting your function keys.