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GPIO A port pins locked on reset

bvege.1
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I am facing an issue with GPIOA initialization upon power reset it's LCKR register is set. so I am unable to initialize some of the port pins mode as output.

Can any one help me on what would cause it to stay in this state?

GPIOA port pins are chosen for TIM2 PWM mode,TIM3 pwm mode ,UART1,FDCAN1, four pins in output mode.

I also configure GPIOB and GPIOC which work fine.

I have configured the pins using STM32cubeMX for STM32G491xx microcontroller.

Appreciate for your help

Thanks,

BV

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