It can the older motion would normally get invalidated as a "consequential" of the second motion - its one of the trickier bits of drafting motion's in a parliamentary system you have to work out what consequentials there are and in which order it makes sense to take a set of motions.

what congress or any parliamentary system cant do is bind it's self (the constitution might) - eg the uk parliament could decide to have an election tomorrow even though they passed a law 4 years back saying we have a fixed 5 year term