Are you trying to insert information or chang information within the table? It looks like you might be trying to update the IName where it is NULL. If so, you could use something like UPDATE [All Batches] SET IName = ("Managing Partner") WHERE IName IS NULL;
INSERT is used for appending records, so unless you are using the WHERE statement to filter where you are receiving the records from, there is no need for it.
Hope that makes sense, if not yell!!