'How to prevent recreation of subscription filters during serverless deployment

I have a function(lambda) that is subscribed to cloudwatch logs of another function. The IaC for this looks like this:

ReadLoginLogs:
  handler: src/API.readFnLogs
  events:
    - cloudwatchLog:
        logGroup: /aws/lambda/project-xxx-api-${self:custom.stage}-function1
        filter: 'THIS_DATA'

The subscription filter is already created for this in AWS but during deployment, i get the following error:

Only 2 subscription filters can be configured per log group. There are subscription filters defined outside of the service definition for "/aws/lambda/project-xxx-api" that have to be deleted manually.

I'm not sure why serverless keeps attempting to recreate the subscription. How do I prevent serverless from attempting to recreate the subscription during deployment and just ignore creating it if it's already there?

aws-lambda serverless serverless-framework

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'How to prevent recreation of subscription filters during serverless deployment

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