Hi Pam,
Tamino wants to be 110% sure that all existing data are valid according to the revised schema 
What you should do is to call the “Define Schema with Instance Check” in the database menu in the schema editor.
But beware this will validate every single document in the DB against the new schema !!! - might take some time with a 10Mio DB…
Finn
#webMethods#API-Management#Tamino