Delete atoms

I want to delete 26 atoms Ga , I use this command :delete_atoms random count 26 Ga NULL 482793 but I have error Illegal delete_atoms command.
Any help !
log.lammps (718 Bytes)

Most likely your LAMMPS version (29 sep 2021) is too old for this command. You have to use the proper documentation version, or upgrade your LAMMPS version.

Thank you for your reply!
I have the new version of LAMMPS (29 Sep 2021)

I know I’ve seen your log file. But the lastest LAMMPS version is 8 Feb 2023.