Even by recent standards, it marks a strange day in Politics when a British Prime Minister views it as a successful result to be given a brief to go back to re-negotiate a deal which is already binding and the EU insists it has no intention of re-opening. Still no credible statement has emerged of what the mooted “alternative arrangements” to the backstop might look like.
The other amendment passed last week was a motion rejecting a no-deal exit. But that motion was passed by an even smaller majority and is not binding on Parliament. Read this post