MSP430FR2033: error #148: declaration is incompatible with "int movingAverage(int, long, int, int, int)"

Hello,

I am writing a moving average function, but I am getting the error mentioned in the title. I would like to understand what the error means and how to avoid it.

Here is the code:

// This part resides in the source file

int movingAverage(int *ptrArrNumbers, long *ptrSum, int pos, int len, int nextNum)
{
    *ptrSum = *ptrSum - ptrArrNumbers[pos] + nextNum;
    ptrArrNumbers[pos] = nextNum;
    return *ptrSum/len;
}

// This part resides in my main source file, but it is not "main.c". 
// It is something else
if(pos0==arr0Length)
        {
            arr0Filled = 1;
            pos0 = 0;
        }

        // If the array has not been fully filled we only consider the number of cases filled with a pressure value
        // to calculate the average pressure (len0). When the array is filled, len0 is the length of the array
        if(arr0Filled == 0)
        {
            len0=pos0+1;
        }
        else
        {
            len0=arr0Length;
        }
        // Moving average
        newAvg0 = movingAvg(arr0Numbers, &sum0, pos0, len0, pressure0);
        pos0++;

Thank you