Invalid keystore format error using Picketbox vault in EAP 6.1.1

Issue

• Migrating vault configuration from EAP 6 to EAP 6.1.1, but application stopped working and failed to start with the following errors

JBAS015804: Error initializing vault --  org.jboss.as.server.services.security.VaultReaderException: org.jboss.security.vault.SecurityVaultException: PB00019: Processing Failed:Unable to get Keystore
Caused by: java.io.IOException: Invalid keystore format

• Using the keystore from older version prior to EAP 6.1.1 does not allow to add the vault configuration through CLI and gives the below exceptions

/core-service=vault:add(vault-options={"KEYSTORE_URL" => "/opt/jboss-eap-6.1.1/jboss-eap6_t/vault/vault.keystore","KEYSTORE_PASSWORD" => "MASK-3EqTGNvEUm2zBW9JGpulUT","KEYSTORE_ALIAS" => "systemprop","SALT" => "jboss123","ITERATION_COUNT" => "25","ENC_FILE_DIR" => "/opt/jboss-eap-6.1.1/jboss-eap6_t/vault/"})
{
    "outcome" => "failed",
    "failure-description" => "JBAS014749: Operation handler failed: JBAS015804: Error initializing vault --  org.jboss.as.server.services.security.VaultReaderException: JBAS013313: Vault Reader Exception:",
    "rolled-back" => true
}

• After upgrading from JBoss EAP 6.1.0 to JBoss EAP 6.1.1 domain controller the domain controller failed with vault being completely unusable.

• Do I need to create a new vault after migrating from EAP 6.0.1 to EAP 6.1.1?