try to add it in the packet_db.txt
packet_ver: 56
packet_keys: 0x2CC4749A,0x1FA954DC,0x72276857
//0x0364,8,NULL,0 // CZ_JOIN_BATTLE_FIELD
0x0367,-1,ReqOpenBuyingStore,2:4:8:9:89
0x0437,7,ActionRequest,2:6
0x0802,18,PartyBookingRegisterReq,2:4
0x0815,10,UseSkillToId,2:4:6
0x0817,10,UseSkillToPos,2:4:6:8
0x0868,90,UseSkillToPosMoreInfo,2:4:6:8:10
0x0875,2,SearchStoreInfoNextPage,0
0x087b,6,SolveCharName,2
0x087d,-1,SearchStoreInfo,2:4:5:9:13:14:15
0x088c,8,MoveFromKafra,2:4
0x088d,5,ChangeDir,2:4
0x0894,6,GetCharNameRequest,2
0x0896,12,SearchStoreInfoListItemClick,2:6:10
0x0899,26,PartyInvite2,2
//0x089e,4,NULL,0 // CZ_GANGSI_RANK
0x089f,2,ReqCloseBuyingStore,0
0x08a2,6,TickSend,2
0x08a8,5,WalkToXY,2
0x08aa,8,MoveToKafra,2:4
0x091b,-1,ReqTradeBuyingStore,2:4:8:12
0x0923,19,WantToConnection,2:6:10:14:18
0x093b,6,DropItem,2:4
0x0945,-1,ItemListWindowSelected,2:4:8:12
0x0946,6,ReqClickBuyingStore,2
0x0947,36,StoragePassword,0
0x0958,5,HomMenu,2:4
0x0960,26,FriendsListAdd,2
0x0964,6,TakeItem,2
^ did not test that but you can try