Unable to add lifecycle policy to s3 bucket using serverless - amazon-web-services

Question

I want to add a lifecycle policy to my existing s3 bucket (using serverless) which deletes all the folders inside my s3 bucket.I have written the code in the serverless.yml.When I am trying to deploy my code i am getting -
Additional stack resources updated failed (UPDATE_ROLLBACK_COMPLETE).
so i checked into cloudformation stacks , i am getting message that my bucket already exists -
my_bucket_name already exists
Resource update cancelled
The following resource(s) failed to create: [my_bucket_name]
I am not sure why am i getting this , my s3_bucket code looks like this -
custom:
additionalStacks:
ressources:
Resources:
MyS3TBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: my_bucket
LifecycleConfiguration:
Rules:
- Status: Enabled
ExpirationInDays: 30
This is not my entire s3 code but a small part of it which is required in this post. Before adding lifecycle configuration everything was working fine. Any help would be appreciated , Thank you

Answer 1

As the error suggests:
my_bucket_name already exists
The bucket that you want to create already exists. If its yours, you have to delete it before you can re-create it. If not, bucket names must be globally unique. This means that maybe some other AWS user has already created a backed with the same name as yours. In this case you must ensure that the back name is absolutely unique, which is often done by adding some random postfix, e.g.:
MyS3TBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: my_bucket-489d939239dd3
LifecycleConfiguration:
Rules:
- Status: Enabled
ExpirationInDays: 30