Premise:

A data submittal has been initially made for several items, reviewed and is successfully running in Merchant Center.

Question:

Additional items ( a few or many) are desired to be submitted to Merchant center.

Can a new submittal be made for only additional items or must old reviewed and successfully running in Merchant Center

items be again submitted with new additiomal items to Merchant Center?

i.e. Can only one data submittal exist for an account at a given time?

Thanks!