Sync files from two collaborators

Hi
we are two developers working on the same project at the same time.
When I modify a style, wappler automatically send the file to the target. But in the same time, the other developer makes modifications to the style and automatically send the file to the target. In this situation when wappler send my modifications it overwrite those of the other developer and vice versa. How can we solve this problem?
Can the local folder and target folder be the same?
Thanks