Set character movement speed

Hello there.
I have Alpha from Mixamo pack and I 'm trying to set its max walk speed higher at some point of my game.
I don’t want to set max walk speed in the character bp because speed is changing.
I set max speed in the spawn blueprint but it doesn’t work. Any ideas?

https://prnt.sc/uwlkgr
https://prnt.sc/uwlkj1

Why don’t you do it on Your ‘Alpha AI’? Like in Construction Script or Begin play.

Because I want to use the same Actor many times but different movement speed each time.

So Promote the speed as a Variable And you can access it anytime