Command block with tick delay destroy and recreated keep ticking

I created a command block that execute a Function after 300 ticks in impulse mode. I put a redstone block below and the function run after 300 tick alright.

If now I remove both the redstone block and the command block before the 300 ticks nothing happen which is good.

But if I destroy them both before the 300 ticks, than recreate the same command block at the same position (without the redstone block) before the 300 ticks, the function will be exectuted. I was hoping that destroying the command block before the end would stop also the timer even if I recreate a command block at the same position. is tere a reliable way to stop a timer ?