Some devices like MCU board or sensor module have the SCL, SDA pins internally pulled up. If you find that the pull up resistance has not been selected properly, how can you fix it without breaking the MCU or sensor?
Is it okay to add pull up resistor externally? Assuming the external pull up voltage is same with the internal pull up voltage.
What if the two voltage levels are different? Suppose that SCL pin is pulled up to 1.83V internally, but you pull it up again to 1.90V externally. Could MCU or sensor be broken? When the SCL is released, current would flow from the external resistor, internal resistor and then to the voltage regulator in your device. Could it affect to the power rail in your device?