File System - File moved event to *.tmp

Hello everybody.

I've seen that in our File System have appeared "File moved" events of the type:

*.XLS --> **.TMP
Can someone explain to me what these events are due to? My suspicion is that
the XLS was opened by a user... and another user has moved it. Could this be so?

https://flic.kr/p/2q9PX4J




Thanks everybody

Greetings