Restricting the BLE peripheral device to connect to only one Master (central)

I am developing a ble peripheral application in android and ios, i am facing an issue like, my android/ios peripheral application is advertising and it got connected with the master (central ) and another central application is getting connected with my peripheral application, hence the data transfer between my application and master( central ) is getting disturbed. Can anyone please suggest a way to restrict my application to get connected with only one central at a time.

Thanks in advance.

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