Files permissions and new backup

Hello! I have a windows domain network.
If I change the permission for files or directories (for example, I add a new user), urbackup starts copying these files/directories again. Is there any way to disable it?

I need to test this, but I haven’t seen that previously.

Are you sure it actually copies the files over again? It doesn’t dedupe them because they were copied before?

Yes. Server on Debian client on Windows 2012 r2

Ah… I only have Windows-based servers and clients here.

Has someone solved this problem? Checked again, Windows 10 home → Linux. The problem exists.

I only have problems with backup?