I have added an attestation on google cloud platform to use for image signing and attestation by the attestor and want to remove the added attestation but I can't seem to find any documentation on how this is done or even if this is how is should be done.

I have seen the one for removal of the attestor but none on removing of deleting the attestation. I had added it using the following command:

Official documentation version:

gcloud container binauthz attestations create \
--project=$PROJECT_ID \
--artifact-url="${CONTAINER_PATH}@${DIGEST}" \ 
--attestor=${ATTESTOR} \  
--signature-file=./signature.pgp \ 
--public-key-id="$KEY_FINGERPRINT"

Online tutorial version:

gcloud beta container binauthz attestations create \ 
   --artifact-url="CONTAINER_PATH@DIGEST" \
   --attestor=ATTESTOT_ID \
   --attestor-project=PROJECT_ID \
   --signature-file=./signature.pgp \
   --pgp-key-fingerprint="KEY_FINGERPRINT"

but from a more recent documentation the --attestor should include the following --attestor="projects/${ATTESTOR_PROJECT_ID}/attestors/${ATTESTOR}" and unfortunately the tutorial I am following didn't use it this way and only added the attestor_id or name. So I want to remove this version and add new one but I am getting a conflict error

Resource in project [xxxx] is the subject of a conflict: occurrence ID "f5981e62-7b42-4f57-8486-b0d9518509fa" already exists in project

So how is it to be removed.

Update: documentation used to compare to online course: https://cloud.google.com/binary-authorization/docs/making-attestations