Save data in redis, docker - docker-compose

Question

I am using docker-compose for my application. Few services to name are web, celery, redis etc.
I need to store the settings selected by user for eg
- app theme (can be light or dark)
- component: switch/ radio button
- app user defaults (eg country etc)
- component: dropdowns
I am saving these setting in redis database. so that when user visits again all custom preferences are loaded for the given user. These are individual component (no form is used), so as user click on any component respective set_function() is called. for eg
def my_baz(value):
"""Used to store app theme."""
k = "key"
v = value
r = redis.StrictRedis.from_url(some_url)
r.set(k,v)
r.bgsave()
def my_bar(value):
"""Used to store app country."""
k = "key"
v = value
r = redis.StrictRedis.from_url(some_url)
r.set(k,v)
r.bgsave()
During docker-compose up, I observed below error and then in the end all services gets up.
The error is occuring due to r.bgsave()
web | some messages till now no error
redis | 1:M 31 Jan 2023 20:46:43.231 * Background saving started by pid 13
web | status = initialize_base_settings() // this function sets some key-value pair using r.set(k,v) and saves it in redis using r.bgsave()
web | ^^^^^^^^^^^^^^^^^
redis | 13:C 31 Jan 2023 20:46:43.284 * DB saved on disk
redis | 13:C 31 Jan 2023 20:46:43.284 * Fork CoW for RDB: current 0 MB, peak 0 MB, average 0 MB
redis | 1:M 31 Jan 2023 20:46:43.329 * Background saving terminated with success
web | raise response
web | redis.exceptions.ResponseError: Background save already in progress
celery | some messages
redis | 1:M 31 Jan 2023 20:46:44.301 * Background saving started by pid 14
redis | 14:C 31 Jan 2023 20:46:44.307 * DB saved on disk
redis | 14:C 31 Jan 2023 20:46:44.308 * Fork CoW for RDB: current 0 MB, peak 0 MB, average 0 MB
celery | raise response
celery | redis.exceptions.ResponseError: Background save already in progress
.
.
few message lines // services restarted again
redis | Finally UP
web | Finally UP
celery | Finally UP
If I remove the r.bgsave() no error occurs during docker-compose up, but this way I will not be able to save the user setting in redis.
So, where should I call r.bgsave() in the app or is there any other setting I can use to save settings in redis?