}
WorksheetCommandHistoryExecutor histExecutor = new WorksheetCommandHistoryExecutor(
worksheetId, workspace);
AlignmentManager alignMgr = AlignmentManager.Instance();
Alignment alignment = alignMgr.getAlignment(workspace.getId(), worksheetId);
if (override || alignment == null || alignment.GetTreeRoot() == null) {
String alignmentId = alignMgr.constructAlignmentId(workspace.getId(), worksheetId);
alignMgr.removeAlignment(alignmentId);
alignMgr.getAlignmentOrCreateIt(workspace.getId(), worksheetId, workspace.getOntologyManager());
editor.deleteExistingTransformationCommands();
historyJson = editor.getHistoryJSON();