Missed depreciation in prior years

In 2019, I bought over 50% of my partner's share in a rental property and forgot to claim depreciation on my prior years' tax returns.

 

I am preparing 2023 tax return.

I am filling up form 3115 for the missed depreciation for 2019 to 2022 eg $X1.

On my  2023 tax forms, I added this asset to my depreciation assets. It asks for "amount of depreciation taken in prior years".  Should I enter $X1 or $0 on this ?

 

Or is there any approach I should be adopting ?

 

Thanks!