Referencing instances of other actor in Default pawn blueprint, two default pawns on level

Hi,
in my default pawn (character) blueprint I am referencing other actors, so I must drag it to the level to set default value of variables referencing other actors on level. When I drag instance of default pawn blueprint on level, there are two same default pawns during gameplay. With just player start actor, I can’t reference other actor.
Tnx.

With just player start actor, I can’t
reference other actor.
Explain please