Error

output "instance_public_ip" {
  value = aws_instance.web.public_ip
  value = aws_instance.web.private_ip
}
C:\Users\Rajesh Kumar\Desktop\Terarform\proj1>terraform validate
╷
│ Error: Attribute redefined
│
│   on aws.tf line 13, in output "instance_public_ip":
│   13:   value = aws_instance.web.private_ip
│
│ The argument "value" was already set at aws.tf:12,3-8. Each argument may be set only once.
╵

Solution

output "instance_public_ip" {
  value = aws_instance.web.public_ip
  value = aws_instance.web.private_ip
}

INTO

output "instance_public_ip" {
  value = aws_instance.web.public_ip
}

output "instance_public_ip" {
  value = aws_instance.web.private_ip
}

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