Sql Trigger - multi-part identifier could not be bound

Question

I'm trying to insert a QuoteNumber from a table called AccountInfo into a table call ShippingInfo where the columns ShippingIdentity match, but I keep getting this error when I try to run this code. The line that throws the error is: inner join inserted on ShippingInfo.ShippingIdentity = a.ShippingIdentity. Can someone please  tell me why? Thanks for any help.

 

ALTER TRIGGER InsertQuoteNumber

ON AccountInfo

FOR INSERT

AS

BEGIN

INSERT INTO ShippingInfo (QuoteNumber)

SELECT a.QuoteNumber

FROM INSERTED as a

inner join inserted on ShippingInfo.ShippingIdentity = a.ShippingIdentity

update ShippingInfo set QuoteNumber = i.QuoteNumber

from ShippingInfo s

inner join inserted i on s.ShippingIdentity = i.ShippingIdentity

END