The amended bill still has to go through the House, but it’s likely to pass when both the amendment and the sanctions themselves received strong bipartisan support (the amendment passed 94 to 6, while the bill cleared the Senate 98 to 2).
While it seems likely that the Senate was going to catch the mistake, it’s safe to say that the consequences of missing it would have been… severe. Numerous upcoming civil and commercial missions are dependent on rockets powered by Russian motors, and the bill would have forced them to delay or even scrap those missions. That’s not very reassuring if you’re a space station crew member waiting for resupplies. The US may be trying to reduce its dependence on Russian space technology by developing more engines of its own, but it can’t cut ties that quickly.