RBAC role change impact to eventing function

If a new eventing function is created with user1 who has read/write access to required buckets/scopes/collections.

Later if roles change (as an example: write permission revoked or user deleted) then existing eventing function will be impacted/undeployed and to deploy this function back we need to have the same RBAC user with the same roles.

Documentation required on the impact.