Disclosed herein are various embodiments for a data replication system. An embodiment operates by determining that a plurality of records of a source table are copied from a source system to a target table of a target system. It is determined that a change table, of the source system, associated with the source table is populated with a plurality of changes occurring to at least a subset of records of the plurality of records while the plurality of records are being copied from the source table of the source system to the target table of the target system. It is determined that the plurality of changes are copied to a shadow table of the target system. It is determined that the target table includes the plurality of records from the source table. The plurality of changes of the shadow table are merged with the target table.