Technical Tip: Unable to Select ‘Custom’ from Setup Firmware Upgrade

[Hiromu]

Description	This article describes a situation where the ‘Custom’ option cannot be selected from the Setup Firmware Upgrade when upgrading FortiGate from FortiManager.
Scope	FortiManager v7.4.
Solution	When FortiGate is selected from FortiManager and ‘Firmware Upgrade’ is selected from ‘More’, the screen for executing a firmware upgrade is displayed. To upgrade FortiGate, either ‘Firmware Template’ or ‘Custom’ can be selected. When using ‘Custom’, the firmware can be directly assigned to execute the upgrade. If a firmware template has already been assigned to the target FortiGate, the Setup Firmware Upgrade option will not be displayed. To use the ‘Custom’ option, unassign the firmware template from the FortiGate. Related article:  Technical Tip: How to upgrade FortiGate using FortiManager