使用Porperties Service [1]，您可以解决您的问题，我编辑了链接到示例电子表格的代码，如下所示：

function PlusMP() {
  var spreadsheet = SpreadsheetApp.getActive();
  spreadsheet.getRange('5:5').activate();
  spreadsheet.getActiveSheet().insertRowsBefore(spreadsheet.getActiveRange().getRow(),1);
  spreadsheet.getActiveRange().offset(0,1,spreadsheet.getActiveRange().getNumColumns()).activate();
  spreadsheet.getRange('6:6').copyTo(spreadsheet.getActiveRange(),SpreadsheetApp.CopyPasteType.PASTE_NORMAL,false);
  spreadsheet.getRange('L5').activate();
  spreadsheet.getActiveRangeList().clear({contentsOnly: true,skipFilteredRows: true});
  spreadsheet.getRange('H5').activate();
  spreadsheet.getActiveRangeList().clear({contentsOnly: true,skipFilteredRows: true});

  //Set offset property
  var scriptProperties = PropertiesService.getScriptProperties();
  var offset = Number(scriptProperties.getProperty('offset'));

  if ( offset == null) {
    scriptProperties.setProperty('offset',1);
  }
  else {
    scriptProperties.setProperty('offset',offset + 1);
  }
};

function PlusCOMP() {
  //Get offset property
  var scriptProperties = PropertiesService.getScriptProperties();
  var offset = Number(scriptProperties.getProperty('offset'));

  if(offset == null) {
    offset = 0;
  }
  var row = 10 + offset;
  var spreadsheet = SpreadsheetApp.getActive();
  spreadsheet.getRange(row + ':' + row).activate();
  spreadsheet.getActiveSheet().insertRowsBefore(spreadsheet.getActiveRange().getRow(),spreadsheet.getActiveRange().getNumColumns()).activate();
  spreadsheet.getRange(row + ':' + row).copyTo(spreadsheet.getActiveRange(),false);
  spreadsheet.getRange('L' + row).activate();
  spreadsheet.getActiveRangeList().clear({contentsOnly: true,skipFilteredRows: true});
  spreadsheet.getRange('H' + row).activate();
  spreadsheet.getActiveRangeList().clear({contentsOnly: true,skipFilteredRows: true});
};

function resetOffset() {
      PropertiesService.getScriptProperties().setProperty('offset',0);
}

运行PlusMP函数时，它将设置或更新offset属性，而运行PlusCOMP函数时，它将使用相同的offset属性相应地插入行。

[1] https://developers.google.com/apps-script/reference/properties/properties