As I mentioned, this is useless, since I don’t know when you downloaded it. Also, the path “legacy” is a hint that it is not likely the proper “latest” version. However it is trivial for you to report what exact version you have by reporting the version string as described in the LAMMPS manual.
Moreover, I clearly didn’t ask about the Windows version, but about the Linux version. The one that does not support the dump_modify command. That one is likely outdated. As can be seen from the dump_modify documentation, the “colname” feature was added in version 4 May 2022: dump_modify command — LAMMPS documentation
For future reference, please have a good look at the forum guidelines, Please Read This First: Guidelines and Suggestions for posting LAMMPS questions, if you expect more accurate and meaningful suggestions from people that are less annoyed by your lack of cooperation.