When I run a program with one CPU core, no error occurs, but when I use four cores, an error occurs：
ERROR on proc 3: Bond atoms 75 76 missing on proc 3 at step 100233 (…/ntopo_bond_all.cpp:63)
Can anyone help? Thanks a lot
Your simulation is behaving badly in both cases, only in the serial run, that specific error cannot happen, since there is no domain decomposition.
Please see 11.2. Errors and warnings details — LAMMPS documentation and the many, many previous discussions of that same error to learn why it happens and what you can do about it.