Is it possible to simply concatenate the two `bundle` files (2015 and 2019) and feed that to client apps? That would allow updating the client first without cha

Is it possible to simply concatenate the two `bundle` files (2015 and 2019) and feed that to client apps? That would allow updating the client first without changing the db, then updating the db without breaking the client. (Then step 3 would be to update the client to just use the 2019 bundle)