Connection error: 1006

Hi,

I am trying to use websocket streaming and I am getting the below error. Could not find any much in the forum. Please help.
Also, is this the most efficient way of the code layout? Basically I am trying to insert the ticks to mysql database. In a separate program I am converting to 5min candles. Will multithreding for kws.connect() help in this simple use? My main logic for signal generation is in the separate code.

Error code: 1006 reason: connection was closed uncleanly (I dropped the WebSocket TCP connection: 'float' object has no attribute 'replace')
Close code: 1006 reason: connection was closed uncleanly (I dropped the WebSocket TCP connection: 'float' object has no attribute 'replace')

My code is as follows.

def on_ticks(ws, ticks):
    # Callback to receive ticks.
    #print(ticks)
    insert_tick(ticks)
    return

def on_connect(ws, response):
    # Callback on successful connect.
    
    sub_token=get_subscribe_list()
    # Subscribe to a list of instrument_tokens.
    ws.subscribe(sub_token)
    # Set to tick in `full` mode.
    #ws.set_mode(ws.MODE_FULL, sub_token)
    
    return

def on_close(ws, code, reason):
    # On connection close stop the main loop
    # Reconnection will not happen after executing `ws.stop()`
    print('Close ','code:',code,'reason:',reason)
    ws.stop()
    return

def on_error(ws, code, reason):
    print('Error ','code:',code,'reason:',reason)
    return

# Assign the callbacks.
kws.on_ticks = on_ticks
kws.on_connect = on_connect
kws.on_close = on_close
kws.on_error = on_error

# Infinite loop on the main thread. Nothing after this will run.
# You have to use the pre-defined callbacks to manage subscriptions.
kws.connect()

Thanks
Arindam