diff --git a/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Copolymer-Generic.FCMat b/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Copolymer-Generic.FCMat
index 8178d25a84..4b13647651 100644
--- a/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Copolymer-Generic.FCMat
+++ b/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Copolymer-Generic.FCMat
@@ -1,6 +1,6 @@
 ---
 General:
-  UUID: "1fed8adb-7bf6-4d8a-9b1e-a3b50f8b2093"
+  UUID: "6d31c041-f189-4715-9911-f52e6de00bef"
   Name: "POM-Copolymer-Generic"
   Author: "FreeCAD"
   License: "CC-BY-SA-4.0"
diff --git a/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Homopolymer-Generic.FCMat b/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Homopolymer-Generic.FCMat
index 8d75925cd2..cecfbf6581 100644
--- a/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Homopolymer-Generic.FCMat
+++ b/src/Mod/Material/Resources/Materials/Standard/Thermoplast/POM-Homopolymer-Generic.FCMat
@@ -1,6 +1,6 @@
 ---
 General:
-  UUID: "1fed8adb-7bf6-4d8a-9b1e-a3b50f8b2093"
+  UUID: "c7495091-4ad6-41c9-a820-454fd2d33f84"
   Name: "POM-Homopolymer-Generic"
   Author: "FreeCAD"
   License: "CC-BY-SA-4.0"