Not able to mount multiple targets (subnets) to a EFS file share - amazon-web-services

Question

I am trying to create multiple mount targets using 3 subnet ids to a single file system through terraform. While running the code it is creating 2 file shares (the second one without a mount target) and then failing giving me the below error.
Error: putting EFS file system (fs-0c479ab4b699829d1) lifecycle configuration: InvalidParameter: 1 validation error(s) found.
│ - missing required field, PutLifecycleConfigurationInput.LifecyclePolicies.
Here's my EFS code.
resource "aws_efs_file_system" "efs" {
creation_token = var.efs_token
performance_mode = var.efs_performance_mode
encrypted = true
lifecycle_policy {
transition_to_ia = "AFTER_30_DAYS"
}
tags = local.mandatory_tags
}
resource "aws_efs_mount_target" "efs_mount" {
count = length(data.aws_subnets.private.*.id)
depends_on = [aws_efs_file_system.efs]
file_system_id = "${aws_efs_file_system.efs.id}"
subnet_id = "${element(data.aws_subnets.private.*.id, count.index)}"
}
resource "aws_efs_backup_policy" "efs_backup_policy" {
file_system_id = "${aws_efs_file_system.efs.id}"
backup_policy {
status = "ENABLED"
}
}
This is the EFS lifecycle policy
resource "aws_efs_file_system_policy" "policy" {
file_system_id = aws_efs_file_system.efs.id
bypass_policy_lockout_safety_check = true
policy = <<POLICY
{
"Version": "2012-10-17",
"Id": "ExamplePolicy01",
"Statement": [
{
"Sid": "ExampleStatement01",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Resource": "${aws_efs_file_system.efs.arn}",
"Action": [
"elasticfilesystem:ClientMount",
"elasticfilesystem:ClientWrite"
],
"Condition": {
"Bool": {
"aws:SecureTransport": "true"
}
}
}
]
}
POLICY
}
data.tf
data "aws_vpc" "this" {
filter {
name = "tag:Name"
values = ["${local.name_prefix}-vpc"]
}
}
data "aws_subnets" "private" {
count = length(data.aws_availability_zones.azs.names)
filter {
name = "tag:Name"
values = ["${local.name_prefix}-vpc-private*"]
}
filter {
name = "vpc-id"
values = [data.aws_vpc.this.id]
}
}
data "aws_availability_zones" "azs" {}
tfvars
efs_token = "dev-load-test"
efs_performance_mode = "maxIO"