ST BLUENRG-LP Bluetooth as a slave machine, how to forbid the other host to initiate the pairing request, I want to only allow the slave machine to initiate the pairing request

[Fx.1]

ret = aci_gap_set_io_capability(IO_CAP_NO_INPUT_NO_OUTPUT);

ret = aci_gap_set_authentication_requirement(BONDING, MITM_PROTECTION_NOT_REQUIRED,

SC_IS_SUPPORTED,

KEYPRESS_IS_NOT_SUPPORTED, MIN_KEY_SIZE, 

MAX_KEY_SIZE,

USE_FIXED_PIN_FOR_PAIRING,

PERIPHERAL_SECURITY_KEY);