Old provider hashicorp/oci issue

[gorspr]

I have an issue with an old (non-existent anymore) hashicorp/oci provider. Even if I don't have it in my provider configuration, some of the resources asks for it, and 'terraform init' installs it and 'terraform plan/apply' wants to use it.

I can clearly see that 'terraform init' installs executable provider, and I can see that executable is in my .terraform path:
.terraform/providers/registry.terraform.io/hashicorp/oci/5.1.0/linux_amd64/terraform-provider-oci_v5.1.0
But when you go to registry.terraform.io you are not able to find hashicorp/oci repository (new one is oracle/oci).
I cleared hashicorp/oci from my ".terraform.lock.hcl" to be sure that is not "me" who asks for hashicorp/oci.
So, somewhere in configuration, some of the resources asks for hashicorp/oci, but which one? There are so many of them.
With grep command I can see that nowhere in my configuration files there is hashicorp/oci as a source in required_providers block.

I read that terraform if it cannot find the provider for specific resource (in configurations) it uses default one, and it seems that defualt one is hashicorp/oci (non-existent).
I tried to play with aliases in ~/.oci/config, unfortunately without any success.

So, any advice how to solve this issue?