I get that pull requesti id isn't been populated.Could anyone help me to solve this?

[Sunilvaradhan]

Starting: Run PR Agent Actions

Task : Command line
Description : Run a command line script using Bash on Linux and macOS and cmd.exe on Windows
Version : 2.246.1
Author : Microsoft Corporation
Help : https://docs.microsoft.com/azure/devops/pipelines/tasks/utility/command-line

Generating script.
========================== Starting Command Output ===========================
/usr/bin/bash --noprofile --norc /__w/_temp/d1c7cf48-d139-4e9c-b465-aa08ee42f706.sh
Running PR Agent action step
SYSTEM_COLLECTIONURI=-------------------------
SYSTEM_TEAMPROJECT=service_con
BUILD_REPOSITORY_NAME=pr-agent.git
SYSTEM_PULLREQUEST_PULLREQUESTID=
Error: One or more required variables are missing.

##[error]Bash exited with code '1'.
Finishing: Run PR Agent Actions