Found in Version:
TR_m3_TT_AddamarysGrave (specifically its script, TR_m3_TT_AddamarysGrave_scp) currently requires the player to have a T_Com_Farm_Shovel_01 in their inventory. A user tried using a T_Com_FireplaceShovel_01 and a misc_de_muck_shovel_01 instead. It seems like those should do the trick just fine, even if they're not strictly for digging holes. I suggest we include the option to use those as well.