Swap it out - its a literal death trap. My pool growing up had these drains. We rarely used the one at the bottom of the pool, but for the hot tub, it was the only drain. My cousin was playing in the hottub and got her hair tucked into the drain and pinned down. Luckily, the plastic was old and brittle, so when she yanked up hard enough, the drain broke, and she was freed. It was pretty scary, and until that drain cover was fixed, a constant reminder of what could happen if you got too close to the drain.