Warning SLOTNODE: 'FullBody' in animation instance class already exists

How to resolve this warning?

Warning SLOTNODE: ‘FullBody’ in animation instance class Dwarf_Slayer__AnimBlueprint_C already exists. Remove duplicates from the animation graph for this class.

There is only 1 slotnode FullBody.

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This problem can be solved by the method on the screen:

This answer works. Thanks