SDLPoolPrimary.migrate is broken because delegatorPool can never be set.
Users can't migrate to new contract because delegatorPool address from which migration is done is always zero. Contract does not have function to explicitly set this address, insted it intended to be set in initialize function.
For delegatorPool pool to be set, it should not be zero, but initially it's zero. So else branch is never executed and pool is never set.
Migration to SDLPoolPrimary is broken and can't be executed.
Manual review
Add function to explicitly set delegatorPool or (i guess it's intended behavior) change if condition in initialize function to ccipController == address(0).
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