I install all bench installation, and next process in start a bench, but i start a bench, some errors will ocuuured, what is this issue

Traceback (most recent call last):
12:43:04 web.1 | File “/usr/lib/python3.9/runpy.py”, line 197, in _run_module_as_main
12:43:04 web.1 | return _run_code(code, main_globals, None,
12:43:04 web.1 | File “/usr/lib/python3.9/runpy.py”, line 87, in _run_code
12:43:04 web.1 | exec(code, run_globals)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/apps/frappe/frappe/utils/bench_helper.py”, line 104, in
12:43:04 web.1 | main()
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/apps/frappe/frappe/utils/bench_helper.py”, line 18, in main
12:43:04 web.1 | click.Group(commands=commands)(prog_name=‘bench’)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 829, in call
12:43:04 web.1 | return self.main(*args, **kwargs)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 782, in main
12:43:04 web.1 | rv = self.invoke(ctx)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 1259, in invoke
12:43:04 web.1 | return _process_result(sub_ctx.command.invoke(sub_ctx))
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 1259, in invoke
12:43:04 web.1 | return _process_result(sub_ctx.command.invoke(sub_ctx))
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 1066, in invoke
12:43:04 web.1 | return ctx.invoke(self.callback, **ctx.params)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/core.py”, line 610, in invoke
12:43:04 web.1 | return callback(*args, **kwargs)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/click/decorators.py”, line 21, in new_func
12:43:04 web.1 | return f(get_current_context(), *args, **kwargs)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/apps/frappe/frappe/commands/init.py”, line 26, in _func
12:43:04 web.1 | ret = f(frappe._dict(ctx.obj), *args, **kwargs)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/apps/frappe/frappe/commands/utils.py”, line 754, in serve
12:43:04 web.1 | frappe.app.serve(port=port, profile=profile, no_reload=no_reload, no_threading=no_threading, site=site, sites_path=’.’)
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/apps/frappe/frappe/app.py”, line 328, in serve
12:43:04 web.1 | run_simple(‘0.0.0.0’, int(port), application,
12:43:04 web.1 | File “/home/venkatesh/demo_frappe_bench/env/lib/python3.9/site-packages/werkzeug/serving.py”, line 990, in run_simple
12:43:04 web.1 | s.bind(server_address)
12:43:04 web.1 | OSError: [Errno 98] Address already in use
12:43:04 socketio.1 | listening on *: 9000
12:43:04 system | web.1 stopped (rc=1)
12:43:04 system | sending SIGTERM to redis_cache.1 (pid 12944)
12:43:04 system | sending SIGTERM to redis_socketio.1 (pid 12947)
12:43:04 system | sending SIGTERM to redis_queue.1 (pid 12952)
12:43:04 system | sending SIGTERM to socketio.1 (pid 12960)
12:43:04 system | sending SIGTERM to watch.1 (pid 12975)
12:43:04 system | sending SIGTERM to schedule.1 (pid 12974)
12:43:04 system | sending SIGTERM to worker_short.1 (pid 12961)
12:43:04 system | sending SIGTERM to worker_long.1 (pid 12969)
12:43:04 system | sending SIGTERM to worker_default.1 (pid 12978)
12:43:04 redis_socketio.1 | 12956:signal-handler (1643613184) Received SIGTERM scheduling shutdown…
12:43:04 redis_queue.1 | 12962:signal-handler (1643613184) Received SIGTERM scheduling shutdown…
12:43:04 redis_socketio.1 | 12956:M 31 Jan 2022 12:43:04.269 # User requested shutdown…
12:43:04 redis_socketio.1 | 12956:M 31 Jan 2022 12:43:04.269 * Removing the pid file.
12:43:04 redis_socketio.1 | 12956:M 31 Jan 2022 12:43:04.269 # Redis is now ready to exit, bye bye…
12:43:04 system | redis_socketio.1 stopped (rc=-15)
12:43:04 system | socketio.1 stopped (rc=-15)
12:43:04 system | schedule.1 stopped (rc=-15)
12:43:04 redis_cache.1 | 12948:signal-handler (1643613184) Received SIGTERM scheduling shutdown…
12:43:04 redis_cache.1 | 12948:M 31 Jan 2022 12:43:04.276 # User requested shutdown…
12:43:04 redis_cache.1 | 12948:M 31 Jan 2022 12:43:04.276 * Removing the pid file.
12:43:04 redis_cache.1 | 12948:M 31 Jan 2022 12:43:04.276 # Redis is now ready to exit, bye bye…
12:43:04 system | worker_default.1 stopped (rc=-15)
12:43:04 system | watch.1 stopped (rc=-15)
12:43:04 system | redis_cache.1 stopped (rc=-15)
12:43:04 system | worker_long.1 stopped (rc=-15)
12:43:04 system | worker_short.1 stopped (rc=-15)
12:43:04 redis_queue.1 | 12962:M 31 Jan 2022 12:43:04.309 # User requested shutdown…
12:43:04 redis_queue.1 | 12962:M 31 Jan 2022 12:43:04.309 * Removing the pid file.
12:43:04 redis_queue.1 | 12962:M 31 Jan 2022 12:43:04.309 # Redis is now ready to exit, bye bye…
12:43:04 system | redis_queue.1 stopped (rc=-15)
venkatesh@venkatesh-Inspiron-3558:~/demo_frappe_bench$