diff --git a/npc/Changelog.txt b/npc/Changelog.txt
index 02c77d1e59..93bfb737fb 100644
--- a/npc/Changelog.txt
+++ b/npc/Changelog.txt
@@ -33,6 +33,9 @@ KarLaeda
 
 Date		Added
 ======
+12/01
+	* Removed outdated Thief Bug ID [Playtester]
+	- 1017 and 1021 don't exist anymore
 11/30
 	* Updated Shinokas Quest to leave no grabage vars [Lupus]
 	- Added a log when players get their jobs
diff --git a/npc/custom/mvm.txt b/npc/custom/mvm.txt
index 2b088de169..6c4236b4c2 100644
--- a/npc/custom/mvm.txt
+++ b/npc/custom/mvm.txt
@@ -91,7 +91,7 @@ if (#monster == 92) summon strcharinfo(0) + "'s Rocker",1052, "OnRockerKilled";
 if (#monster == 100) summon strcharinfo(0) + "'s Skeleton",1076, "OnSkeletonKilled";
 if (#monster == 101) summon strcharinfo(0) + "'s Plankton",1161, "OnPlanktonKilled";
 if (#monster == 102) summon strcharinfo(0) + "'s Antonio",1247, "OnAntonioKilled";
-if (#monster == 103) summon strcharinfo(0) + "'s Thief Bug Female",1017, "OnThiefFemaleKilled";
+if (#monster == 103) summon strcharinfo(0) + "'s Thief Bug Female",1053, "OnThiefFemaleKilled";
 close;
 }
 
diff --git a/npc/eamobs/fields/mjolnir.txt b/npc/eamobs/fields/mjolnir.txt
index 88ccf7913e..a0c98db35f 100644
--- a/npc/eamobs/fields/mjolnir.txt
+++ b/npc/eamobs/fields/mjolnir.txt
@@ -222,7 +222,7 @@ mjolnir_10.gat,123,331,10,10	monster	Shining Plant	1083,1,1800000,900000,1
 //==================================================
 mjolnir_11.gat,0,0,0,0	monster	Flora	1118,60,0,0,0
 mjolnir_11.gat,0,0,0,0	monster	Mandragora	1020,50,0,0,0
-mjolnir_11.gat,0,0,0,0	monster	Thief Bug Male	1021,30,0,0,0
+mjolnir_11.gat,0,0,0,0	monster	Thief Bug Male	1054,30,0,0,0
 mjolnir_11.gat,0,0,0,0	monster	Poporing	1031,10,0,0,0
 mjolnir_11.gat,0,0,0,0	monster	Argiope	1099,10,0,0,0
 mjolnir_11.gat,112,276,0,0	monster	Green Plant	1080,1,180000,90000,1
@@ -243,5 +243,5 @@ mjolnir_11.gat,332,327,0,0	monster	Blue Plant	1079,1,360000,180000,1
 // mjolnir_12 - Mt.Mjolnir
 //==================================================
 mjolnir_12.gat,0,0,0,0	monster	Dustiness	1114,50,0,0,0
-mjolnir_12.gat,0,0,0,0	monster	Thief Bug Female	1017,20,0,0,0
+mjolnir_12.gat,0,0,0,0	monster	Thief Bug Female	1053,20,0,0,0
 mjolnir_12.gat,0,0,0,0	monster	Stem Worm	1215,20,0,0,0
diff --git a/npc/jobs/novice/novice.txt b/npc/jobs/novice/novice.txt
index 90267adfc4..1310e4c309 100644
--- a/npc/jobs/novice/novice.txt
+++ b/npc/jobs/novice/novice.txt
@@ -3425,4 +3425,4 @@ new_zone03.gat,0,0,0,0	monster	Shell Picky	1050,2,0,0,0
 new_zone03.gat,0,0,0,0	monster	Spore	1014,1,0,0,0
 new_zone03.gat,0,0,0,0	monster	Thief Bug Larva	1051,1,0,0,0
 new_zone03.gat,0,0,0,0	monster	Rocker	1052,1,0,0,0
-new_zone03.gat,0,0,0,0	monster	Thief Bug Female	1017,1,0,0,0
+new_zone03.gat,0,0,0,0	monster	Thief Bug Female	1053,1,0,0,0