Serverless deploy not adding Lambda File System

Hi!

I’ve added the following to the config file as specified on the serverless.com website https://www.serverless.com/framework/docs/providers/aws/guide/functions/#efs-configuration but the sls deploy is not adding the File System information. Do you have any tips on why? When I add it manually everything works.

fileSystemConfig:
  localMountPath: /mnt/efs
  arn: arn:aws:elasticfilesystem:us-east-1:xxxxxx:access-point/fsap-xxxxxxx

Thanks
Joao