Please correct this sentence

[JRD]

Please note that once we break the tiles (terra-cotta) that are around the pool, it needs to be replaced with new one (not same as existing one) due to out of stock.

[river]

Please note that once we break the tiles (terra-cotta) that are around the pool, it needs to be replaced with new one (not same as existing one) due to out of stock.

You need to explain this.

What is the part about out of stock?

[JRD]

You need to explain this.

What is the part about out of stock?

Thanks for your reply

We do not have any existing tiles in Stock. So, We have to replace with
new one if we removed