I'm guessing the problem is this line:
pair_style lj/cut 1.12246152962189
If you have some bond that is longer than this, then
you won't be able to delete it in parallel, b/c a
proc won't have the other atom in the bond further
away then the cutoff. So you should make that
cutoff longer before you do delete_bonds. You
can always switch it back to the distance you
want after deleting bonds and before you do a run.
Steve