(secret-key-)credential-store overwrites existing aliases when generating or importing keys

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:generate-secret-key(alias=a1)
{"outcome" => "success"}

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:read-aliases
{
    "outcome" => "success",
    "result" => ["a1"]
}

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:generate-secret-key(alias=a1)
{"outcome" => "success"}

-------------------------

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:export-secret-key(alias=a2)
{
    "outcome" => "success",
    "result" => {"key" => "RUxZAUuJqp+mNwIEDMrUz0iK6dyG"}
}

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:import-secret-key(alias=a2,key=RUxZAUuJqp+mNwIEDMrUz0iK6dyG)
{"outcome" => "success"}

-------------------------

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:add-alias(alias=a2,secret-value=a2)
{"outcome" => "success"}

[standalone@localhost:9990 /] /subsystem=elytron/credential-store=a:add-alias(alias=a2,secret-value=a2)
{
    "outcome" => "failed",
    "failure-description" => "WFLYELY00913: Credential alias 'a2' of credential type 'org.wildfly.security.credential.PasswordCredential' already exists in the store",
    "rolled-back" => true
}