3659370 - Replication Flow fails with error "Schema validation failed."

Replication flow fails with following error:

Error message: "Schema validation failed. Please ensure the primary key of the source table matches the primary key definition of the input schema derived from the source table or the transform. Expected column XX at index X in the source table primary key but found XXXXX. Expected column XXXXX at index X in the source table primary key but found XXXXX"

SAP Datasphere

failure, database schema mismatch, connectivity, user schema, delta replication, validation, replication artifacts, artifacts, DS, RF. , KBA , DS-DI-RF , Replication Flow Runtime , Problem