Hi Mily,

The code is below:

<?xml version="1.0" encoding="utf-8"?>
<odoo>
<record model="ir.module.category" id="base.module_category_human_resources_business_trips">
<field name="description">Helps you manage your trips.</field>
<field name="sequence">13</field>
</record>

<record id="group_gb_trips_team_approver" model="res.groups">
<field name="name">Team Approver</field>
<field name="category_id" ref="base.module_category_human_resources_business_trips"/>
<field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>
</record>

<record id="base.default_user" model="res.users">
<field name="groups_id" eval="[(4,ref('gb_trips.group_gb_trips_manager'))]"/>
</record>
</odoo>

What change should i apply.

Try the following
<record model="ir.module.category" id="module_category_human_resources_business_trips">
<field name="description">Helps you manage your trips.</field>
<field name="sequence">13</field>
</record>
<record id="group_gb_trips_team_approver" model="res.groups">
<field name="name">Team Approver</field>
<field name="category_id" ref="module_category_human_resources_business_trips"/>
<field name="implied_ids" eval="[(4, ref('base.group_user'))]"/>
</record>

Now new error is displayed.

Traceback (most recent call last):
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 556, in _tag_root
f(rec)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 456, in _tag_record
record = model._load_records([data], self.mode == 'update')
File "/opt/odoo17/odoo/odoo/models.py", line 5052, in _load_records
records = self._load_records_create([data['values'] for data in to_create])
File "/opt/odoo17/odoo/odoo/models.py", line 4963, in _load_records_create
return self.create(values)
File "<decorator-gen-12>", line 2, in create
File "/opt/odoo17/odoo/odoo/api.py", line 415, in _model_create_multi
return create(self, arg)
File "/opt/odoo17/odoo/odoo/models.py", line 4592, in create
records = self._create(data_list)
File "/opt/odoo17/odoo/odoo/models.py", line 4780, in _create
cr.execute(SQL(
File "/opt/odoo17/odoo/odoo/sql_db.py", line 332, in execute
res = self._obj.execute(query, params)
psycopg2.errors.NotNullViolation: null value in column "name" of relation "ir_module_category" violates not-null constraint
DETAIL: Failing row contains (114, 1, 2024-03-05 11:05:51.477128, 2024-03-05 11:05:51.477128, 1, null, null, 13, {"en_US": "Helps you manage your trips."}, t, null).

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

Traceback (most recent call last):
File "/opt/odoo17/odoo/odoo/http.py", line 1722, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/opt/odoo17/odoo/odoo/service/model.py", line 133, in retrying
result = func()
File "/opt/odoo17/odoo/odoo/http.py", line 1749, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/opt/odoo17/odoo/odoo/http.py", line 1953, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/opt/odoo17/odoo/addons/website/models/ir_http.py", line 235, in _dispatch
response = super()._dispatch(endpoint)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
result = endpoint(**request.params)
File "/opt/odoo17/odoo/odoo/http.py", line 722, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/opt/odoo17/odoo/addons/web/controllers/dataset.py", line 28, in call_button
action = self._call_kw(model, method, args, kwargs)
File "/opt/odoo17/odoo/addons/web/controllers/dataset.py", line 20, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/opt/odoo17/odoo/odoo/api.py", line 466, in call_kw
result = _call_kw_multi(method, model, args, kwargs)
File "/opt/odoo17/odoo/odoo/api.py", line 453, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "<decorator-gen-77>", line 2, in button_immediate_install
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 75, in check_and_log
return method(self, *args, **kwargs)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 459, in button_immediate_install
return self._button_immediate_function(type(self).button_install)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 583, in _button_immediate_function
registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "<decorator-gen-16>", line 2, in new
File "/opt/odoo17/odoo/odoo/tools/func.py", line 87, in locked
return func(inst, *args, **kwargs)
File "/opt/odoo17/odoo/odoo/modules/registry.py", line 113, in new
odoo.modules.load_modules(registry, force_demo, status, update_module)
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 480, in load_modules
processed_modules += load_marked_modules(env, graph,
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 364, in load_marked_modules
loaded, processed = load_module_graph(
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 227, in load_module_graph
load_data(env, idref, mode, kind='data', package=package)
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 71, in load_data
tools.convert_file(env, package.name, filename, idref, mode, noupdate, kind)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 627, in convert_file
convert_xml_import(env, module, fp, idref, mode, noupdate)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 693, in convert_xml_import
obj.parse(doc.getroot())
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 613, in parse
self._tag_root(de)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 569, in _tag_root
raise ParseError('while parsing %s:%s, somewhere inside\n%s' % (
odoo.tools.convert.ParseError: while parsing /opt/odoo17/odoo/addons/gb_trips/security/gb_trips_security.xml:3, somewhere inside
<record model="ir.module.category" id="module_category_human_resources_business_trips">
<field name="description">Helps you manage your trips.</field>
<field name="sequence">13</field>
</record>

you need to update the name for ir.module,category
Try this
<record model="ir.module.category" id="module_category_human_resources_business_trips">
<field name="name">Trips</field>
<field name="description">Helps you manage your trips.</field>
<field name="sequence">13</field>
</record>

New error is formed, after the 'base.' get removed and added the name field

Traceback (most recent call last):
File "/opt/odoo17/odoo/odoo/http.py", line 1722, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/opt/odoo17/odoo/odoo/service/model.py", line 133, in retrying
result = func()
File "/opt/odoo17/odoo/odoo/http.py", line 1749, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/opt/odoo17/odoo/odoo/http.py", line 1953, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
result = endpoint(**request.params)
File "/opt/odoo17/odoo/odoo/http.py", line 722, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/opt/odoo17/odoo/addons/web/controllers/dataset.py", line 28, in call_button
action = self._call_kw(model, method, args, kwargs)
File "/opt/odoo17/odoo/addons/web/controllers/dataset.py", line 20, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/opt/odoo17/odoo/odoo/api.py", line 466, in call_kw
result = _call_kw_multi(method, model, args, kwargs)
File "/opt/odoo17/odoo/odoo/api.py", line 453, in _call_kw_multi
result = method(recs, *args, **kwargs)
File "<decorator-gen-77>", line 2, in button_immediate_install
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 75, in check_and_log
return method(self, *args, **kwargs)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 459, in button_immediate_install
return self._button_immediate_function(type(self).button_install)
File "/opt/odoo17/odoo/odoo/addons/base/models/ir_module.py", line 583, in _button_immediate_function
registry = modules.registry.Registry.new(self._cr.dbname, update_module=True)
File "<decorator-gen-16>", line 2, in new
File "/opt/odoo17/odoo/odoo/tools/func.py", line 87, in locked
return func(inst, *args, **kwargs)
File "/opt/odoo17/odoo/odoo/modules/registry.py", line 113, in new
odoo.modules.load_modules(registry, force_demo, status, update_module)
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 480, in load_modules
processed_modules += load_marked_modules(env, graph,
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 364, in load_marked_modules
loaded, processed = load_module_graph(
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 227, in load_module_graph
load_data(env, idref, mode, kind='data', package=package)
File "/opt/odoo17/odoo/odoo/modules/loading.py", line 71, in load_data
tools.convert_file(env, package.name, filename, idref, mode, noupdate, kind)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 623, in convert_file
convert_csv_import(env, module, pathname, fp.read(), idref, mode, noupdate)
File "/opt/odoo17/odoo/odoo/tools/convert.py", line 646, in convert_csv_import
fields = next(reader)
StopIteration

This was the new error

Sorry, New error is not formed by removal of 'base.' and by adding the name field. It actually resolved my previous error. Thank you Mily