Its a Steve Harris bass, it should be able to repair itself when you play Trooper! 
As many people mentioned above it doesnt look like something important, just a crack on the finish.
By the way i wonder why they havent put a 70s style neck on it when they released the bass? Steve uses the exact same bass from the beginning, only the body finish changed in time, the neck is always been 70s style precision neck even on his backup basses.
I know he carried that signature bass to the concerts but i never saw him using it, perhaps he brought the bass in order to promote the sales of the bass.
As many people mentioned above it doesnt look like something important, just a crack on the finish.
By the way i wonder why they havent put a 70s style neck on it when they released the bass? Steve uses the exact same bass from the beginning, only the body finish changed in time, the neck is always been 70s style precision neck even on his backup basses.
I know he carried that signature bass to the concerts but i never saw him using it, perhaps he brought the bass in order to promote the sales of the bass.
it.