Hello,

Even if I am grateful to you for writing a description of your change, I think there is a mistake here.

This name has already been discussed in the past—had you inspected the history of the node prior to changing it, you would have seen this—and "Meise" is the official spelling in both languages nowadays.  "Meysse" is a former spelling that is no longer used nowadays, despite there is an "Avenue de Meysse" in Brussels.
See this: https://fr.wikipedia.org/wiki/Meise