I have set the main currency to PKR and I don't deal with any other currency. But when i try to install the POS module i get the following error

"Error:
Odoo Server Error

Traceback (most recent call last):
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 712, in parse
    self._tag_root(de)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 674, in _tag_root
    f(rec)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 674, in _tag_root
    f(rec)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 577, in _tag_record
    record = model._load_records([data], self.mode == 'update')
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 4104, in _load_records
    records = self._load_records_create([data['values'] for data in to_create])
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 4018, in _load_records_create
    return self.create(values)
  File "<decorator-gen-164>", line 2, in create
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 317, in _model_create_single
    return self.browse().concat(*(create(self, vals) for vals in arg))
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 317, in <genexpr>
    return self.browse().concat(*(create(self, vals) for vals in arg))
  File "d:\projects\odoo\odoo-13\odoo-13.0\addons\point_of_sale\models\pos_config.py", line 461, in create
    pos_config = super(PosConfig, self).create(values)
  File "<decorator-gen-3>", line 2, in create
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 335, in _model_create_multi
    return create(self, [arg])
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 3746, in create
    records = self._create(data_list)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 3852, in _create
    cr.execute(query, params)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\sql_db.py", line 168, in wrapper
    return f(self, *args, **kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\sql_db.py", line 245, in execute
    res = self._obj.execute(query, params)
psycopg2.errors.NotNullViolation: null value in column "pricelist_id" violates not-null constraint
DETAIL:  Failing row contains (1, Shop, 16, null, 1, null, null, null, null, null, null, null, f, t, null, subtotal, null, null, null, null, null, null, null, t, dbc70b84-b703-49dd-9706-109372019e34, 73, 74, null, 1, 1, 71, 70, null, null, null, null, null, null, null, f, null, null, null, null, null, null, null, null, null, null, null, null, 1, 2020-09-13 10:01:36.730635, 1, 2020-09-13 10:01:36.730635).


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 624, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 310, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\pycompat.py", line 14, in reraise
    raise value
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 669, in dispatch
    result = self._call_function(**self.params)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 350, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\service\model.py", line 94, in wrapper
    return f(dbname, *args, **kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 339, in checked_call
    result = self.endpoint(*a, **kw)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 915, in __call__
    return self.method(*args, **kw)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\http.py", line 515, in response_wrap
    response = f(*args, **kw)
  File "d:\projects\odoo\odoo-13\odoo-13.0\addons\web\controllers\main.py", line 1326, in call_button
    action = self._call_kw(model, method, args, kwargs)
  File "d:\projects\odoo\odoo-13\odoo-13.0\addons\web\controllers\main.py", line 1314, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 387, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 374, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "<decorator-gen-59>", line 2, in button_immediate_install
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\addons\base\models\ir_module.py", line 72, in check_and_log
    return method(self, *args, **kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\addons\base\models\ir_module.py", line 463, in button_immediate_install
    return self._button_immediate_function(type(self).button_install)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\addons\base\models\ir_module.py", line 573, in _button_immediate_function
    modules.registry.Registry.new(self._cr.dbname, update_module=True)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\modules\registry.py", line 86, in new
    odoo.modules.load_modules(registry._db, force_demo, status, update_module)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\modules\loading.py", line 423, in load_modules
    loaded_modules, update_module, models_to_check)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\modules\loading.py", line 315, in load_marked_modules
    perform_checks=perform_checks, models_to_check=models_to_check
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\modules\loading.py", line 225, in load_module_graph
    load_data(cr, idref, mode, kind='data', package=package, report=report)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\modules\loading.py", line 68, in load_data
    tools.convert_file(cr, package.name, filename, idref, mode, noupdate, kind, report)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 736, in convert_file
    convert_xml_import(cr, module, fp, idref, mode, noupdate, report)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 803, in convert_xml_import
    obj.parse(doc.getroot())
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 721, in parse
    exc_info[2]
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\pycompat.py", line 13, in reraise
    raise value.with_traceback(tb)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 712, in parse
    self._tag_root(de)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 674, in _tag_root
    f(rec)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 674, in _tag_root
    f(rec)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\tools\convert.py", line 577, in _tag_record
    record = model._load_records([data], self.mode == 'update')
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 4104, in _load_records
    records = self._load_records_create([data['values'] for data in to_create])
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 4018, in _load_records_create
    return self.create(values)
  File "<decorator-gen-164>", line 2, in create
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 317, in _model_create_single
    return self.browse().concat(*(create(self, vals) for vals in arg))
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 317, in <genexpr>
    return self.browse().concat(*(create(self, vals) for vals in arg))
  File "d:\projects\odoo\odoo-13\odoo-13.0\addons\point_of_sale\models\pos_config.py", line 461, in create
    pos_config = super(PosConfig, self).create(values)
  File "<decorator-gen-3>", line 2, in create
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\api.py", line 335, in _model_create_multi
    return create(self, [arg])
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 3746, in create
    records = self._create(data_list)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\models.py", line 3852, in _create
    cr.execute(query, params)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\sql_db.py", line 168, in wrapper
    return f(self, *args, **kwargs)
  File "D:\Projects\Odoo\Odoo-13\odoo-13.0\odoo\sql_db.py", line 245, in execute
    res = self._obj.execute(query, params)
odoo.tools.convert.ParseError: "null value in column "pricelist_id" violates not-null constraint
DETAIL:  Failing row contains (1, Shop, 16, null, 1, null, null, null, null, null, null, null, f, t, null, subtotal, null, null, null, null, null, null, null, t, dbc70b84-b703-49dd-9706-109372019e34, 73, 74, null, 1, 1, 71, 70, null, null, null, null, null, null, null, f, null, null, null, null, null, null, null, null, null, null, null, null, 1, 2020-09-13 10:01:36.730635, 1, 2020-09-13 10:01:36.730635).
" while parsing file:/d:/projects/odoo/odoo-13/odoo-13.0/addons/point_of_sale/data/point_of_sale_data.xml:2, near
<odoo>
    <data noupdate="1">
        <!-- After closing the PoS, open the dashboard menu -->
        <record id="action_client_pos_menu" model="ir.actions.client">
            <field name="name">Open POS Menu</field>
            <field name="tag">reload</field>
            <field name="params" eval="{'menu_id': ref('menu_point_root')}"/>
        </record>

        <function model="stock.warehouse" name="_create_missing_pos_picking_types"/>

        <record id="product_category_pos" model="product.category">
            <field name="parent_id" ref="product.product_category_1"/>
            <field name="name">PoS</field>
        </record>

        <record id="product_product_tip" model="product.product">
            <field name="name">Tips</field>
            <field name="categ_id" ref="point_of_sale.product_category_pos"/>
            <field name="default_code">TIPS</field>
            <field name="weight">0.01</field>
            <field name="available_in_pos" eval="True"/>
            <field name="taxes_id" eval="[(5,)]"/>
        </record>

        <record model="pos.config" id="pos_config_main">
            <field name="name">Shop</field>
            <field name="barcode_nomenclature_id" ref="barcodes.default_barcode_nomenclature"/>
        </record>

        <record id="product_product_consumable" model="product.product">
            <field name="name">Discount</field>
            <field name="available_in_pos">True</field>
            <field name="standard_price">0.00</field>
            <field name="list_price">0.00</field>
            <field name="weight">0.00</field>
            <field name="type">consu</field>
            <field name="categ_id" ref="point_of_sale.product_category_pos"/>
            <field name="uom_id" ref="uom.product_uom_unit"/>
            <field name="uom_po_id" ref="uom.product_uom_unit"/>
            <field name="default_code">DISC</field>
            <field name="purchase_ok">False</field>
        </record>

        <record id="uom.product_uom_categ_unit" model="uom.category">
            <field name="is_pos_groupable">True</field>
        </record>
        <function model="pos.config" name="post_install_pos_localisation"/>
    </data>
</odoo>"