ERROR: Atom IDs must be consecutive for velocity create loop all

Hi,

I have a problem with deleting atoms from my structure. Here is my input file:

LAMMPS data file. CGCMM style. atom_style hybrid generated by VMD/TopoTools v1.2 on Wed Jun 24 16:34:59 +0200 2015
18 atoms
12 bonds
6 angles
0 dihedrals
0 impropers
4 atom types
1 bond types
1 angle types
0 dihedral types
0 improper types
0.725012 30.725012 xlo xhi
-0.616127 29.383873 ylo yhi
-10.086679 38.913321 zlo zhi

# Pair Coeffs