UPGRADING ADOM VERSION

Hi I recently updated the Firmware version of Fortimanager 400C from image FMG_400C-v500-build0310-FORTINET to FMG_400C-v5-build0753-FORTINET and to FMG_400C-v5-build0780-FORTINET but after successfully updating the Firmware  Device are not adding It shows Firmware inconsistency you need to upgrade the ADOM version. I am using Fortigate 60D most of them having  Firmware version v5.2.11,build754 (GA) and some have v5.2.13,build762 (GA).

I am attaching the error snapshots please help me regarding this.