diff --git a/.changes/next-release/feature-AWSIoT-e90fa27.json b/.changes/next-release/feature-AWSIoT-e90fa27.json
new file mode 100644
index 00000000000..8c23c9c659d
--- /dev/null
+++ b/.changes/next-release/feature-AWSIoT-e90fa27.json
@@ -0,0 +1,6 @@
+{
+    "type": "feature",
+    "category": "AWS IoT",
+    "contributor": "",
+    "description": "Unsuppress the following operations that were previously suppressed:\n\n - AttachPrincipalPolicy\n - DetachPrincipalPolicy\n - ListPolicyPrincipals\n - ListPrincipalPolicies\n\nThese operations were previously supporessed because they were deprecated. However, this may be a blocker for customers moving from V1 to V2, so make these available for those customers."
+}
diff --git a/services/iot/src/main/resources/codegen-resources/customization.config b/services/iot/src/main/resources/codegen-resources/customization.config
index 1ebfa285e40..c26c974f03b 100644
--- a/services/iot/src/main/resources/codegen-resources/customization.config
+++ b/services/iot/src/main/resources/codegen-resources/customization.config
@@ -44,12 +44,6 @@
         "listAuditFindings",
         "listV2LoggingLevels"
     ],
-    "deprecatedOperations": [
-        "AttachPrincipalPolicy",
-        "DetachPrincipalPolicy",
-        "ListPolicyPrincipals",
-        "ListPrincipalPolicies"
-    ],
     "shapeModifiers": {
         "AssetPropertyVariant": {
             "union": true