(Terraform) Error 400: Invalid request: instance name (pg_instance)., invalid

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  module "dev_vm" {
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    network    = "dev-vpc"
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  module "prod_vm" {
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  Error: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0].subnetwork': 'projects/cloud-sandbox/regions/us-east4/subnetworks/dev-vpc'. The referenced subnetwork resource cannot be found., invalid
  
    on modules/terraform-vm/main.tf line 6, in resource "google_compute_instance" "vm_instance":
     6: resource "google_compute_instance" "vm_instance" {
  
  
  
  Error: Error creating instance: googleapi: Error 400: Invalid value for field 'resource.networkInterfaces[0].subnetwork': 'projects/cloud-sandbox/regions/us-east4/subnetworks/prod-vpc'. The referenced subnetwork resource cannot be found., invalid
  
    on modules/terraform-vm/main.tf line 6, in resource "google_compute_instance" "vm_instance":
     6: resource "google_compute_instance" "vm_instance" {
  
  

  Why it will try to use subnets from other project IDs when those are strictly specified per module?

  PS.

  Provider file contains

  provider "google" {
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    region      = var.region
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  ╷
  │ Error: googleapi: Error 400: Request contains an invalid argument., badRequest
  │
  │   with data.google_service_account_access_token.super_admin,
  │   on main.tf line 22, in data "google_service_account_access_token" "super_admin":
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  │
  ╵
  

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  I've a two modules under modules directory named as prienv and vpc

  nnice@MPL-G8WW7D3:~/terra-test/modules/prienv$ pwd
  /home/nnice/terra-test/modules/prienv
  nnice@MPL-G8WW7D3:~/terra-test/modules/prienv$ ls
  data.tf  main.tf  variable.tf
  

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  data "aws_security_groups" "mysg-data" {
    filter {
      name   = "tag:Name"
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      name   = "tag:Name"
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  variable "pri_av" {
    description = "for private availability zone"
    type        = string
    default     = "us-east-1b"
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  variable "ami" {
    description = "ami for ec2"
    type        = string
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  }
  
  variable "instance_type" {
    description = "Instance type t2.micro"
    type        = string
    default     = "t2.micro" #will use double quotes for string type
  }
  
  variable "key_pair" {
    description = "key pair for ec2"
    type        = string
    default     = "learner_key"
  }
  
  variable "instance_count" {
    description = "EC2 instance count"
    type        = number
    default     = 1 #here we're using it to create two private instances
  }
  
  variable "project_environment" {
    description = "project name and environment for private instances"
    type        = map(string)
    default = {
      project     = "private", # it works upon key value pair where project is for key and environment is value
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  resource "aws_instance" "mypriec2" {
    ami               = var.ami
    instance_type     = var.instance_type
    count             = var.instance_count
    availability_zone = var.pri_av
    #subnet_id              = aws_subnet.myprisn.id
    subnet_id = data.aws_subnet.myprisn-data.id
    #vpc_security_group_ids = [aws_security_group.mysg.id]
    vpc_security_group_ids = data.aws_security_groups.mysg-data.ids
    key_name               = var.key_pair
    # disable_api_termination = true
    tags = var.project_environment
  }
  
  resource "aws_key_pair" "mykeypair" {
    key_name   = var.key_pair
    public_key = "ssh-rsa AAAAB3NaffrWscf59juCakElys9F3+zVuz0ta4gRUtKgWVPIj6ACr00VNDzsTTW2/sSjYtE5zWolVKCITlhqiIhgRKUDLKoxclxUKnK6IGIafdaefafaheiufa;fdaeoasfdkQvNtGrrHzY5/dbZhIUTxDUyvT5O5U= nnice@MPL-G8WW7D3"
  }
  

  and here is my vpc moduls

  nnice@MPL-G8WW7D3:~/terra-test/modules/vpc$ pwd
  /home/nnice/terra-test/modules/vpc
  nnice@MPL-G8WW7D3:~/terra-test/modules/vpc$ ls
  data.tf  main.tf  variable.tf
  

  This is my data.tf file under vpc module

  nnice@MPL-G8WW7D3:~/terra-test/modules/vpc$ cat data.tf
  data "aws_vpc" "myvpc-data" {
    filter {
      name   = "tag:Name"
      values = ["MyVPC"]
    }
    depends_on = [aws_vpc.myvpc]
  }
  
  data "aws_subnet" "mypubsn-data" {
    filter {
      name   = "tag:Name"
      values = ["MyPubSN"]
    }
    depends_on = [aws_subnet.mypubsn]
  }
  
  data "aws_subnet" "myprisn-data" {
    filter {
      name   = "tag:Name"
      values = ["MyPriSN"]
    }
    depends_on = [aws_subnet.myprisn]
  }
  

  This is my main.tf file under vpc module

  nnice@MPL-G8WW7D3:~/terra-test/modules/vpc$ cat main.tf
  ##################################################################
  ############################## VPC ###############################
  ##################################################################
  
  resource "aws_vpc" "myvpc" {
    cidr_block       = var.vpc_cidr
    instance_tenancy = var.vpc_tenancy
  
    tags = {
      Name = var.vpc_tag
    }
  }
  
  ##################################################################
  ############################# Subnet #############################
  ##################################################################
  
  #PUBLIC SUBNET
  resource "aws_subnet" "mypubsn" {
    #vpc_id                 = aws_vpc.myvpc.id
    vpc_id                  = data.aws_vpc.myvpc-data.id
    cidr_block              = var.mypubsn_cidr
    availability_zone       = var.pub_av
    map_public_ip_on_launch = var.map_public_ip_on_launch
    tags = {
      Name = var.mypubsn_tag
    }
  }
  
  #PRIVATE SUBNET
  resource "aws_subnet" "myprisn" {
    #vpc_id            = aws_vpc.myvpc.id
    vpc_id            = data.aws_vpc.myvpc-data.id
    cidr_block        = var.myprisn_cidr
    availability_zone = var.pri_av
  
    tags = {
      Name = var.myprisn_tag
    }
  }
  
  ##################################################################
  ############################### IGW ##############################
  ##################################################################
  
  resource "aws_internet_gateway" "myigw" {
    #vpc_id = aws_vpc.myvpc.id
    vpc_id = data.aws_vpc.myvpc-data.id
    tags = {
      Name = var.igw_tag
    }
  }
  
  ##################################################################
  ############################ Route Table #########################
  ##################################################################
  
  #PUBLIC RT
  resource "aws_route_table" "mypubrt" {
    #vpc_id = aws_vpc.myvpc.id
    vpc_id = data.aws_vpc.myvpc-data.id
  
    tags = {
      Name = var.mypubsn_tag
    }
  }
  
  #PRIVATE RT
  resource "aws_route_table" "myprirt" {
    #vpc_id = aws_vpc.myvpc.id
    vpc_id = data.aws_vpc.myvpc-data.id
  
    tags = {
      Name = var.myprisn_tag
    }
  }
  
  ####################################################################
  ######################## Route Table Associate #####################
  ####################################################################
  
  #PUBLIC RT association
  resource "aws_route_table_association" "pub" {
    #subnet_id      = aws_subnet.mypubsn.id
    subnet_id      = data.aws_subnet.mypubsn-data.id
    route_table_id = aws_route_table.mypubrt.id
  }
  
  #PRIVATE RT association
  resource "aws_route_table_association" "pri" {
    #subnet_id      = aws_subnet.myprisn.id
    subnet_id      = data.aws_subnet.myprisn-data.id
    route_table_id = aws_route_table.myprirt.id
  }
  
  ###################################################################
  ########################### Route #################################
  ###################################################################
  
  #PUBLIC Route
  resource "aws_route" "mypubroute" {
    route_table_id         = aws_route_table.mypubrt.id
    destination_cidr_block = var.pubroute
    gateway_id             = aws_internet_gateway.myigw.id
    depends_on             = [aws_route_table.mypubrt]
  }
  
  #PRIVATE Route
  #resource "aws_route" "mypriroute" {
  #  route_table_id            = aws_route_table.myprirt.id
  #  destination_cidr_block    = "0.0.0.0/0"
  #  gateway_id             = aws_internet_gateway.myigw.id
  #  depends_on                = [aws_route_table.myprirt]
  #}
  
  ###################################################################
  ############################ SG ###################################
  ###################################################################
  
  resource "aws_security_group" "mysg" {
    name        = "MySecurityGroup"
    description = "Allow TLS inbound traffic"
    #vpc_id      = aws_vpc.myvpc.id
    vpc_id = data.aws_vpc.myvpc-data.id
  
    ingress {
      description = "TLS from VPC"
      from_port   = 22
      to_port     = 22
      protocol    = "tcp"
      # cidr_blocks      = [aws_vpc.myvpc.cidr_block]
      cidr_blocks = ["0.0.0.0/0"]
      # ipv6_cidr_blocks = [aws_vpc.main.ipv6_cidr_block]
    }
  
    ingress {
      description = "TLS from VPC"
      from_port   = 80
      to_port     = 80
      protocol    = "tcp"
      # cidr_blocks      = [aws_vpc.myvpc.cidr_block]
      cidr_blocks = ["0.0.0.0/0"]
      # ipv6_cidr_blocks = [aws_vpc.main.ipv6_cidr_block]
    }
  
    egress {
      from_port        = 0
      to_port          = 0
      protocol         = "-1"
      cidr_blocks      = ["0.0.0.0/0"]
      ipv6_cidr_blocks = ["::/0"]
    }
  
    tags = {
      Name = var.SG_tag
    }
  }
  

  And this is my variable.tf file under vpc module

  nnice@MPL-G8WW7D3:~/terra-test/modules/vpc$ cat variable.tf
  variable "vpc_tenancy" {
    description = "vpc instance tenancy"
    type        = string
    default     = "default"
  }
  
  variable "pub_av" {
    description = "for public availability zone"
    type        = string
    default     = "us-east-1a"
  }
  
  variable "pri_av" {
    description = "for private availability zone"
    type        = string
    default     = "us-east-1b"
  }
  
  variable "vpc_tag" {
    description = "Tag for VPC"
    type        = string
    default     = "MyVPC"
  }
  
  variable "vpc_cidr" {
    description = "for vpc cidr"
    type        = string
    default     = "10.0.0.0/16"
  }
  
  variable "mypubsn_cidr" {
    description = "for public subnet cidr"
    type        = string
    default     = "10.0.1.0/24"
  }
  
  variable "myprisn_cidr" {
    description = "for private subnet cidr"
    type        = string
    default     = "10.0.2.0/24"
  }
  
  variable "mypubsn_tag" {
    description = "tag for public subnet"
    type        = string
    default     = "MyPubSN"
  }
  
  variable "myprisn_tag" {
    description = "tag for private subnet"
    type        = string
    default     = "MyPriSN"
  }
  
  variable "igw_tag" {
    description = "tag for IGW subnet"
    type        = string
    default     = "MyIGW"
  }
  
  variable "pubrt_tag" {
    description = "tag for private subnet"
    type        = string
    default     = "MyPubRT"
  }
  
  variable "prirt_tag" {
    description = "tag for IGW subnet"
    type        = string
    default     = "MyPriRT"
  }
  
  variable "pubroute" {
    description = "cidr for public route"
    type        = string
    default     = "0.0.0.0/0"
  }
  
  variable "SG_tag" {
    description = "tag for SG"
    type        = string
    default     = "MySG"
  }
  
  variable "map_public_ip_on_launch" {
    description = "auto enable public ip to public subnet"
    type        = bool
    default     = true
  }
  
  

  And there is env directory where I have my main.tf file

  nnice@MPL-G8WW7D3:~/terra-test$ ls
  env  modules
  nnice@MPL-G8WW7D3:~/terra-test$ cd env/private-ec2/
  nnice@MPL-G8WW7D3:~/terra-test/env/private-ec2$ pwd
  /home/nnice/terra-test/env/private-ec2
  nnice@MPL-G8WW7D3:~/terra-test/env/private-ec2$ ls
  main.tf
  nnice@MPL-G8WW7D3:~/terra-test/env/private-ec2$ cat main.tf
  #Provider
  
  provider "aws" {
    region = "us-east-1"
  }
  
  #VPC
   
  module "vpc" {
    source = "../../modules/vpc"
  }
  
  #EC2
  
  module "prienv" {
    source = "../../modules/prienv"
  }
  

  When I'm trying to run terraform plan, I'm getting following errors

   Error: Reference to undeclared resource
  │
  │   on ../../modules/prienv/data.tf line 6, in data "aws_security_groups" "mysg-data":
  │    6:   depends_on = [aws_security_groups.mysg]
  │
  │ A managed resource "aws_security_groups" "mysg" has not been declared in module.prienv.
  ╵
  ╷
  │ Error: Reference to undeclared resource
  │
  │   on ../../modules/prienv/data.tf line 14, in data "aws_subnet" "myprisn-data":
  │   14:   depends_on = [aws_subnet.myprisn]
  │
  │ A managed resource "aws_subnet" "myprisn" has not been declared in module.prienv.
  

  Could anyone please let me know its solution? I already using vpc module in my main.tf file