PVS-Studio warning V557 for saga

#define DATUM_CODE_LENGTH           7

typedef struct Datum_Table_Row
{
  ...
  char Code[DATUM_CODE_LENGTH];
  ...
} Datum_Row;

long Initialize_Datums_File(const char *File_7Parms,
                            const char *File_3Parms)
{
  ...
  for (i = 0; i < DATUM_CODE_LENGTH; i++)
    Datum_Table_3Param[index].Code[i] =
      Datum_Table_3Param[index].Code[i+1];
  ...
}

This suspicious code was found in saga project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The value of 'i + 1' index could reach 7. pj_geotrans datum.c 367

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/