SDDC Manager precheck fails with the following error message: "Check if out-of-band upgrade have been performed"
ESXi hosts were upgraded manually outside of SDDC Manager workflows, resulting in a version mismatch between the actual host deployment and the SDDC Manager PostgreSQL database.
Follow the KB Synchronize inventory versions after out-of-band upgrade in a VMware Cloud Foundation Environment
If the issue persists contact VMware by Broadcom support for further assistance: Creating and managing Broadcom support cases.