Then there's no credible way it could get to the Delta Quadrant. Even at Botany Bay speeds (i.e. fast enough to cover at least the majority of the 250-ly distance to Alpha Ceti within 270 years), it would take nearly 40,000 years to get to the part of Delta where this show seems to be set; at a more realistic sleeper ship speed, it would've taken closer to a million years. Okay, Bajorans are supposed to have been civilized tens of thousands of years ago, but Tellarites? Not to mention that it's hard to buy any kind of sleeper technology lasting a fraction that long without breaking down.
More likely we're talking a long-range warp ship at a speed slower than Voyager's, long enough to take generations to reach Delta.