When you run a MongoDB V2 mapping to write data to a MongoDB V2 target configured with a primary key update column in the Target transformation, the mapping updates or upserts data only in the first row that contains the same primary key value. (July 2025)

Although a source field of Double data type contains a Null value, the mapping writes 0 to the target instead of maintaining the Null value for the Double data type. (April 2025)