Function is making duplicates of entries every time Function is ran.

[Ryan Weaver]

Good Afternoon All,

I have a stock sheet where the items are moved from the stock checkout sheet if the array formula says move. This occurs onopen. But when the function runs sometimes it makes copies of the already moved entries. I have no idea why it is doing this. To test this just delete a row in Carpet or LVP Stock List, then close and reopen the sheet.

Here is the Sheet

https://docs.google.com/spreadsheets/d/1dUJvyH2PuXdIyMQ8clfhRITDN_x5khYs5RynJ2z9s2k/edit?usp=sharing

Here is the script I have

function onOpen() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheets = ss.getSheets();
  var targetSheet = ss.getSheetByName('Past Checkouts'); // destination sheet
  var excludes = ['LVP Stock List','Carpet Stock List','Misc Stock','Data']; // sheets to exclude
  var dataColumns = [1,2,3,4,5,6,7,8]; // columns to copy values from
  sheets.forEach(function(sheet) { // copy values
    if (excludes.indexOf(sheet.getName()) != -1) return; // check sheet is not excluded
    var found = 0;
    sheet
      .getDataRange()
      .getValues()
      .forEach(function(row, i) {
        if (row[8] == 'Move') { // Gets the rows that have the 4th col Move
          row.forEach(function(val, j) {
            if (dataColumns.indexOf(j + 1) != -1) return;
            row[j] = '';
          });
          targetSheet.appendRow(row);
          sheet.deleteRow(i + 1 - found); // delete the source row
          found += 1;
        }
      });
  });
}

[Keith Andersen]

After much trial/error and working through glitches etc.....It's finally done.
Please watch this video first. Then make a copy of this sheet (it is view only for security). 
Once you've made the copy, go through permissions as per video.

Any questions - email me.

Video

https://youtu.be/2AFbvtb5M8k

Sheet

https://docs.google.com/spreadsheets/d/1A4nTzhw8nRFKx9qRparYmCdJh2DI9_sm-kOLd1ypAZM/edit?usp=sharing

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