diff --git a/ISSUES.md b/ISSUES.md
index 052929a..5d17ed5 100644
--- a/ISSUES.md
+++ b/ISSUES.md
@@ -48,7 +48,6 @@
 |KHR_MATERIALS_CLEARCOAT_CLEARCOAT_NORMAL_TEXTURE_TEXCOORD|Normal and clearcoat normal textures should use the same texture coords.|Warning|
 |KHR_MATERIALS_DISPERSION_NO_VOLUME|The dispersion extension needs to be combined with the volume extension.|Warning|
 |KHR_MATERIALS_EMISSIVE_STRENGTH_ZERO_FACTOR|Emissive strength has no effect when the emissive factor is zero or undefined.|Warning|
-|KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID|Thickness maximum must be greater than or equal to the thickness minimum.|Error|
 |KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_WITHOUT_TEXTURE|Thickness minimum has no effect when a thickness texture is not defined.|Information|
 |KHR_MATERIALS_IRIDESCENCE_THICKNESS_TEXTURE_UNUSED|Thickness texture has no effect when the thickness minimum is equal to the thickness maximum.|Information|
 |KHR_MATERIALS_VOLUME_DOUBLE_SIDED|The volume extension should not be used with double-sided materials.|Warning|
diff --git a/lib/src/errors.dart b/lib/src/errors.dart
index 5f7b21b..b07e28f 100644
--- a/lib/src/errors.dart
+++ b/lib/src/errors.dart
@@ -547,12 +547,6 @@ class SemanticError extends IssueType {
               'when a thickness texture is not defined.',
           Severity.Information);
 
-  static final SemanticError khrMaterialsIridescenceThicknessRangeInvalid =
-      SemanticError._(
-          'KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID',
-          (args) => 'Thickness maximum must be greater than or '
-              'equal to the thickness minimum.');
-
   static final SemanticError khrMaterialsIridescenceThicknessTextureUnused =
       SemanticError._(
           'KHR_MATERIALS_IRIDESCENCE_THICKNESS_TEXTURE_UNUSED',
diff --git a/lib/src/ext/KHR_materials_iridescence/khr_materials_iridescence.dart b/lib/src/ext/KHR_materials_iridescence/khr_materials_iridescence.dart
index be2071e..b5d2454 100644
--- a/lib/src/ext/KHR_materials_iridescence/khr_materials_iridescence.dart
+++ b/lib/src/ext/KHR_materials_iridescence/khr_materials_iridescence.dart
@@ -65,13 +65,6 @@ class KhrMaterialsIridescence extends GltfProperty {
         map, IRIDESCENCE_THICKNESS_TEXTURE, context, TextureInfo.fromMap);
 
     if (context.validate) {
-      if (iridescenceThicknessMinimum > iridescenceThicknessMaximum) {
-        context.addIssue(
-            SemanticError.khrMaterialsIridescenceThicknessRangeInvalid,
-            name: map.containsKey(IRIDESCENCE_THICKNESS_MINIMUM)
-                ? IRIDESCENCE_THICKNESS_MINIMUM
-                : IRIDESCENCE_THICKNESS_MAXIMUM);
-      }
       if (iridescenceThicknessTexture != null) {
         if (iridescenceThicknessMinimum == iridescenceThicknessMaximum) {
           context.addIssue(
diff --git a/test/ext/KHR_materials_iridescence/assets.json b/test/ext/KHR_materials_iridescence/assets.json
index 5bd0ad7..63ab3d5 100644
--- a/test/ext/KHR_materials_iridescence/assets.json
+++ b/test/ext/KHR_materials_iridescence/assets.json
@@ -4,7 +4,6 @@
         "tests": {
             "custom_property.gltf": "Custom property",
             "unexpected_extension.gltf": "Unexpected extension object location",
-            "invalid_thickness_range.gltf": "Invalid thickness range",
             "unused_thickness_texture.gltf": "Unused thickness texture",
             "unused_thickness_minimum.gltf": "Unused thickness minimum",
             "valid.gltf": "Valid"
diff --git a/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf b/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf
deleted file mode 100644
index 3f5bbcb..0000000
--- a/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf
+++ /dev/null
@@ -1,47 +0,0 @@
-{
-    "asset": {
-        "version": "2.0"
-    },
-    "extensionsUsed": [
-        "KHR_materials_iridescence"
-    ],
-    "materials": [
-        {
-            "extensions": {
-                "KHR_materials_iridescence": {
-                    "iridescenceFactor": 1,
-                    "iridescenceThicknessMinimum": 500,
-                    "iridescenceThicknessMaximum": 90,
-                    "iridescenceThicknessTexture": {
-                        "index": 0
-                    }
-                }
-            }
-        },
-        {
-            "extensions": {
-                "KHR_materials_iridescence": {
-                    "iridescenceFactor": 1,
-                    "iridescenceThicknessMaximum": 90,
-                    "iridescenceThicknessTexture": {
-                        "index": 0
-                    }
-                }
-            }
-        },
-        {
-            "extensions": {
-                "KHR_materials_iridescence": {
-                    "iridescenceFactor": 1,
-                    "iridescenceThicknessMinimum": 500,
-                    "iridescenceThicknessTexture": {
-                        "index": 0
-                    }
-                }
-            }
-        }
-    ],
-    "textures": [
-        { }
-    ]
-}
\ No newline at end of file
diff --git a/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf.report.json b/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf.report.json
deleted file mode 100644
index 9023c87..0000000
--- a/test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf.report.json
+++ /dev/null
@@ -1,68 +0,0 @@
-{
-    "uri": "test/ext/KHR_materials_iridescence/data/material/invalid_thickness_range.gltf",
-    "mimeType": "model/gltf+json",
-    "validatorVersion": "2.0.0-dev.3.8",
-    "issues": {
-        "numErrors": 3,
-        "numWarnings": 0,
-        "numInfos": 3,
-        "numHints": 0,
-        "messages": [
-            {
-                "code": "KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID",
-                "message": "Thickness maximum must be greater than or equal to the thickness minimum.",
-                "severity": 0,
-                "pointer": "/materials/0/extensions/KHR_materials_iridescence/iridescenceThicknessMinimum"
-            },
-            {
-                "code": "KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID",
-                "message": "Thickness maximum must be greater than or equal to the thickness minimum.",
-                "severity": 0,
-                "pointer": "/materials/1/extensions/KHR_materials_iridescence/iridescenceThicknessMaximum"
-            },
-            {
-                "code": "KHR_MATERIALS_IRIDESCENCE_THICKNESS_RANGE_INVALID",
-                "message": "Thickness maximum must be greater than or equal to the thickness minimum.",
-                "severity": 0,
-                "pointer": "/materials/2/extensions/KHR_materials_iridescence/iridescenceThicknessMinimum"
-            },
-            {
-                "code": "UNUSED_OBJECT",
-                "message": "This object may be unused.",
-                "severity": 2,
-                "pointer": "/materials/0"
-            },
-            {
-                "code": "UNUSED_OBJECT",
-                "message": "This object may be unused.",
-                "severity": 2,
-                "pointer": "/materials/1"
-            },
-            {
-                "code": "UNUSED_OBJECT",
-                "message": "This object may be unused.",
-                "severity": 2,
-                "pointer": "/materials/2"
-            }
-        ],
-        "truncated": false
-    },
-    "info": {
-        "version": "2.0",
-        "extensionsUsed": [
-            "KHR_materials_iridescence"
-        ],
-        "animationCount": 0,
-        "materialCount": 3,
-        "hasMorphTargets": false,
-        "hasSkins": false,
-        "hasTextures": true,
-        "hasDefaultScene": false,
-        "drawCallCount": 0,
-        "totalVertexCount": 0,
-        "totalTriangleCount": 0,
-        "maxUVs": 0,
-        "maxInfluences": 0,
-        "maxAttributes": 0
-    }
-}
\ No newline at end of file