When a duplicate parameter name is encountered in the pipeline, there is an issue with inaccurate path reporting.

[l-qing]

Expected Behavior

admission webhook "validation.webhook.pipeline.tekton.dev" denied the request: validation failed: params names must be unique, the same param: abc is defined multiple times at:
spec.tasks[0].params[1].name

Actual Behavior

admission webhook "validation.webhook.pipeline.tekton.dev" denied the request: validation failed: parameter names must be unique, the parameter "abc" is also defined at:
spec.tasks.params[0][1].name, spec.tasks[0].params[1].name

Steps to Reproduce the Problem

1. Create a pipeline

cat <<EOF | kubectl create -f -
apiVersion: tekton.dev/v1beta1
kind: Pipeline
metadata:
  name: pipeline
spec:
  tasks:
    - name: name-1
      taskRef:
        name: hi
        kind: Task
      params:
        - name: "abc"
          value: ""
        - name: "abc"
          value: ""
EOF

Additional Info

• Kubernetes version:

Client Version: v1.29.1
Server Version: v1.27.7

• Tekton Pipeline version:

v0.56.0

[l-qing]

/assign @l-qing