The galaxy's primordial makeup suggests that its rate of star formation has been much lower than that of other galaxies of similar age. (hubblesite.org)
The likely scenario in which this could have happened is if the galaxy hosting the black hole experienced mergers or collisions with other galaxies through its evolutionary history. (sciencemag.org)
The galaxy, therefore, may have formed at the same time as most other galaxies. (hubblesite.org)