<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def make_fields_unique(self, fields):
 """ iterates over the row and make each field unique """

        for i in range(0, len(fields)):
            for j in range(i+1, len(fields)):
                if fields[i] == fields[j]:
                    fields[j] += "'"