With what can I try to rename such items?

ERROR: Cannot find xmodel 'nyaa_perkacola_deadshot'.
ERROR: xmodel 'nyaa_perkacola_mulekick' not found
ERROR: Cannot find xmodel 'nyaa_perkacola_mulekick'.
ERROR: xmodel 'nyaa_perkacola_staminup' not found
ERROR: Cannot find xmodel 'nyaa_perkacola_staminup'.