I attempted to publish price feed with my delegate, but got this message.
mywallet (unlocked) >>> wallet_publish_price_feed delegate-clayop 0.0185 USD
10 assert_exception: Assert Exception
my->_blockchain->is_active_delegate( current_account->id ):
    {}
    th_a  wallet.cpp:1811 publish_price
    {"account_to_publish_under":"delegate-clayop","amount_per_xts":0.018499999999999999,"amount_asset_symbol":"USD","sign":true}
    th_a  wallet.cpp:1865 publish_price
    {}
    th_a  common_api_client.cpp:2035 wallet_publish_price_feed
    {"command":"wallet_publish_price_feed"}
    th_a  cli.cpp:556 execute_command
The delegate is running on 0.4.24-RC2 but blockchain info does not show its version name. (why?)