Web Reference: The pre-update schema check compares the scripts folder States/Target in the Deployment Resources with the Target Database using SQL Compare and originates the error if the scripts folder is not identical to the Target Database. Oct 22, 2025 · When upgrading vCenter Server, the error message " Source vCenter Server schema validation found an issue " appears when the Stage 2 pre-check fails. In /var/log/vmware/upgrade/vcdb_req.err errors related to extra DB tables being present in the source vCenter's DB exist such as the example below: The STATUS field will be either UPGRADING or UPGRADED during the schema patching operation, and will become VALID when the operation is completed. If the status appears as INVALID, the schema update failed. You should examine the logs files to determine the reason for the failure.
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