Atom O1 in residue HIS 180 was not found in rtp entry HISE with 17 atoms while sorting atoms

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GROMACS version: 2023.4
GROMACS modification: Yes/No
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When i run ’gmx pdb2gmx -f … -p … -water spce -ignh‘ , error occurs,“Fatal error: Atom O1 in residue HIS 180 was not found in rtp entry HISE with 17 atoms while sorting atoms.”

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The program found an extra atom in HIS 180 that it wasn’t expecting to find in a HISE residue. This suggests something is wrong with the structure the residue HIS 180 in your pdb file