Provider constraint <6.0.0 causes conflicts in other modules

[prshoper]

TL;DR

Using a Terraform provider version constraint <6.0.0 causes a conflict or bug in other modules. The issue likely occurs due to incompatibility between this version constraint and the rest of the configuration. Updating or adjusting the provider version might be required to resolve the conflict.

Expected behavior

Terraform should execute the plan and apply the configuration without issues, respecting the provider version constraint <=6.0.0 and maintaining compatibility with all modules

Observed behavior

The provider version constraint <=6.0.0 generates a conflict or bug in other modules, leading to a failure. The error message communicates that no successful version of the provider could be used due to the constraint.

Terraform Configuration

module "mysql-db" {
  source                          = "GoogleCloudPlatform/sql-db/google//modules/mysql"
  version                         = "22.1.0"
...
}

AND
module "iap_bastion" {
  source  = "terraform-google-modules/bastion-host/google"
  version = "7.1.0"
....
}

Terraform Version

Terraform v1.9.8

Additional information

No response

[Stevesibilia]

I can confirm that provider constraints is causing issue with some other modules (i.e.: lb-http).

To solve the issue you should change the minimum version of submodule instance_template to 12.