Sub deployment .war in jboss-deployment-structure.xml was not found

Issue

• When deploying a TEST.ear, a below deployment error shows and fails to deploy the application.
• TEST.war is included in TEST.ear archive file.
• User deployed TEST.ear archive file with defining application-name as TEST.war

Error log

08:28:10,499 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: ([("deployment" => "TEST.war")]) - failure description: {"WFLYCTL0080: Failed services" => {"jboss.deployment.unit.\"TEST.war\".STRUCTURE" => "WFLYSRV0153: Failed to process phase STRUCTURE of deployment \"TEST.war\"
    Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: WFLYSRV0166: Sub deployment TEST.war in jboss-deployment-structure.xml was not found. Available sub deployments: "}}

TEST.ear/META-INF/jboss-deployment-structure.xml

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure xmlns="urn:jboss:deployment-structure:1.2">
   <deployment>
  ..
   </deployment>
   <sub-deployment name="TEST.war">
   ...            
   </sub-deployment>
</jboss-deployment-structure>