أحسن الله إليكم Shaykh, if a person made tayammum because he couldn't find water, does his wudu become invalid once he finds water?

There are two opinions among the scholars in regards to this: 1. One opinion says that his purity is broken and he needs to make ablution. 2. The other opinion says his purity remains, and the only things that break his purity are the established nullifiers of purity.