this is my model

name = fields.Char(string='Nama Pasien', required=True, translate=True, tracking=True)
age = fields.Integer(string='Umur', required=True, translate=True, tracking=True)
gender = fields.Selection([
    ('laki-laki', 'Laki-laki'),
    ('perempuan', 'Perempuan'),
],string='Jenis Kelamin', required=True, translate=True, tracking=True)

this is error

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "D:\odoo15\server\odoo\http.py", line 643, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "D:\odoo15\server\odoo\http.py", line 301, in _handle_exception
    raise exception.with_traceback(None) from new_cause
psycopg2.errors.DatatypeMismatch: COALESCE types text and integer cannot be matched

this hapen when after submitting the data then odoo want to display the data in view form

how to solve this please