I have problem while reading date from excel file. I use following:

FileInputStream inputStream = new FileInputStream(excelFilePath);

Workbook workbook = new XSSFWorkbook(inputStream);

Sheet firstSheet = workbook.getSheetAt(0);
Iterator<Row> rowIterator = firstSheet.iterator();

Cell nextCell = cellIterator.next();
Date testTimestamp = nextCell.getDateCellValue();

This lead me to ERROR:
Cannot get a NUMERIC value from a STRING cell

Column in excel is type of General (I tried also Date, Time, Text, Number)
Value in this column is like: 2023-10-11 13:20:43.000

Thank you in advance for help