Technical Tip: 'Duplicate Entry Found' error when creating an administrator user

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Description	This article describes the cause and solution for the Duplicate Entry Found error encountered when creating an administrator user in FortiGate with remote authentication via RADIUS.
Scope	FortiGate devices using remote authentication and administrator accounts configured with the Wildcard option enabled.
Solution	Why the Duplicate Entry Found error occurs: In FortiGate, the Wildcard option allows any user from a specified remote group (e.g., GRP_ADMINISTRATORS) to authenticate without the need to create a manual administrator account. When a user from that remote group tries to log in, FortiGate automatically recognizes them as an administrator based on the group membership. If an administrator attempts to manually create a user with the same name as an existing user in the remote group, FortiGate detects a conflict because that username already exists dynamically via the Wildcard mechanism. This results in the Duplicate Entry Found error.