File "/home/syedhamza/custom/programming/enviornments/odoo/odoo13/src/odoo/odoo/addons/base/models/ir_attachment.py", line 216, in _get_datas_related_values
    'index_content': self._index(bin_data, mimetype),
TypeError: _index() missing 1 required positional argument: 'mimetype'

why i am getting this error while installing a custom module? i have tried to find this issue in community but i couldn't find any luck.