When inserting a specific value into an identity column, you need to specify the columns in your table that you want to put values into, including the identity column.
create table #test (id int identity, val int)
set identity_insert #test on
insert into #test (id,val) values (100, 200)
both the id and val columns are specified
You will need to specify the relevant columns that are in your tblSCVMatchedv3 table