Attachment point problem for gibs

When players gib, oftentimes this error shows up mentioning it can't find specified attachment points for a particle effect. Can you try dealing with it? Thanks in advance, guys!

Failed to find attachment point specified for particle effect in model 'models/player/gibs/rebelgib_03.mdl' keyvalues section. Trying to spawn effect 'GibSpray' on attachment named 'bloodspray'

PS: It happens with almost all the gib models...