Sometimes, things go well and other times you think they go well and upon reflection, there's just something not quite achieved that you were striving for. That was the case here, as there had been some solid bass recorded around a week ago for this song, but for whatever reason, upon revisiting it, it just didn't feel right.
No point in forcing the issue, just re-record it, right? That is just what we did. In its place, is exactly what we're looking for in tone and note duration. The feel of the song, if you will.