fix: Fix messages when we try to delete an attribute
fix: Fix messages when we try to delete an attribute

MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,FIRSTdotorg/MISP,FIRSTdotorg/MISP,SteveClement/MISP,FIRSTdotorg/MISP,SteveClement/MISP