Ligand atoms miss matched after extract from protein ligand complex

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I am trying to generate ions.tpr file but i found this error -------------------------------------------------------
Program: gmx grompp, version 2021.4-Ubuntu-2021.4-2
Source file: src/gromacs/gmxpreprocess/grompp.cpp (line 681)

Fatal error:
number of coordinates in coordinate file (solv.gro, 116755)
does not match topology (topol.top, 116799)

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------------------------------------------------------- i noted the ligand itp contain 83 atom and in my topol and solv.gro file 39 atoms after extract from protein ligand complex, Please help me to solv this issue.