MongoDb Relational Migrator Keep throw error.

Hi.
While CDC is in processing, data changes from RDB are catched but the Relational Migrator throws error.
The message says “The update path ‘:{updated colunm}’ contains an empty field name, which is not allowed”.
However the automatically generated collection , naming like “*–Cache”, has updated data from RDB which is not reflected at the final collection.

Does who has same issue, please some ideas.