Timer Update Interrupt clarification

This is a line of code i don't understand,

 /* Force the TIMx prescaler with immediate access (gen update event)
    */
    LL_TIM_SetPrescaler(TIMx, pHandle->HALLMaxRatio);
    LL_TIM_GenerateEvent_UPDATE(TIMx);

The code is part of the __weak void HALL_Init(HALL_Handle_t *pHandle) function

when the second line of code is executed does it mean that i get the interrupt timer over flow interrupt immediately. Please clarify. The TIM4 is configured in XOR / Hall mode.

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