Run the code.
If there are results, script out the tables and have a look at the identity and the PK structure
If the PK contains the identity column and has extra columns, considering that an identity should be unique, consider altering the table to recreate the PK only on the identity.
There may have been a misunderstanding and there may have been a need to create a unique constraint on the extra columns.
Anyway, ask the devs what the intent was and always test before pressing F5.