ValidationError: You must use a valid fully-formed launch template. he key pair 'pxxx-sxx_key_pair' does not exist

[eravindar12]

Hi All, I've observed the following error. Could you kindly advise on the appropriate steps to resolve it?

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│ Error: creating Auto Scaling Group (ASG-bastion-lt20240311205143210400000001): ValidationError: You must use a valid fully-formed launch template. The key pair 'ppp-stg_key_pair' does not exist
│ 	status code: 400, request id: 9c068220-c4e9-4bb3-90c8-a5672f6f68f6
│ 
│   with module.bastion.aws_autoscaling_group.bastion_auto_scaling_group,
│   on .terraform/modules/bastion/main.tf line 275, in resource "aws_autoscaling_group" "bastion_auto_scaling_group":
│  275: resource "aws_autoscaling_group" "bastion_auto_scaling_group" {
│ 
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