Is Pending Kill From Function Error

Hello dear friends.I have a random spawn actors blueprint for my similation environment.When I click play button everything works correctly.But When I click ESC I get this error.How can i fix this issue.
Thanks…

Blueprint

Error

Hello! This means that all these objects will be garbage collected.

They are like walking death objects and access them is dangerous.

Probably they aren’t referenced or bad coded(c++)

ı just solved ı put is valid node to between