diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e8482ba..af92ace8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,11 +11,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres
 to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.5.0-dev.1]
+## [1.5.0-dev.2]
 
 ### Fixed
 
 - Accessory could not be recovered from NO_RESPONSE using single Characteristic
+- Make unsupported Characteristic error more
+  descriptive [#456](https://github.com/NRCHKB/node-red-contrib-homekit-bridged/issues/456)
 
 ### Changed
 
diff --git a/package.json b/package.json
index 91210cc0..c9dda35e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-red-contrib-homekit-bridged",
-  "version": "1.5.0-dev.1",
+  "version": "1.5.0-dev.2",
   "description": "Node-RED nodes to simulate Apple HomeKit devices.",
   "main": "build/nodes/nrchkb.js",
   "scripts": {
@@ -58,7 +58,7 @@
     "@types/mocha": "^9.0.0",
     "@types/node": "^10.17.50",
     "@types/node-persist": "^3.1.2",
-    "@types/node-red": "^1.1.1",
+    "@types/node-red": "^1.2.0",
     "@types/semver": "^7.3.9",
     "@types/uuid": "^8.3.1",
     "@typescript-eslint/eslint-plugin": "^5.3.1",
diff --git a/src/lib/utils/CharacteristicUtils.ts b/src/lib/utils/CharacteristicUtils.ts
index 82c7069d..1f75c397 100644
--- a/src/lib/utils/CharacteristicUtils.ts
+++ b/src/lib/utils/CharacteristicUtils.ts
@@ -88,7 +88,8 @@ module.exports = function (node: HAPServiceNodeType) {
             }
         })
 
-        return supported
+        // Removing accidental duplicate values
+        return [...new Set(supported)]
     }
 
     return {
diff --git a/src/lib/utils/CharacteristicUtils2.ts b/src/lib/utils/CharacteristicUtils2.ts
index 50c8cfc5..f0799af5 100644
--- a/src/lib/utils/CharacteristicUtils2.ts
+++ b/src/lib/utils/CharacteristicUtils2.ts
@@ -90,7 +90,8 @@ module.exports = function (node: HAPService2NodeType) {
             }
         })
 
-        return supported
+        // Removing accidental duplicate values
+        return [...new Set(supported)]
     }
 
     return {
diff --git a/src/lib/utils/ServiceUtils.ts b/src/lib/utils/ServiceUtils.ts
index dc8493e6..ce7d057d 100644
--- a/src/lib/utils/ServiceUtils.ts
+++ b/src/lib/utils/ServiceUtils.ts
@@ -241,9 +241,9 @@ module.exports = function (node: HAPServiceNodeType) {
         Object.keys(msg.payload).map((key: string) => {
             if (node.supported.indexOf(key) < 0) {
                 log.error(
-                    `Instead of ${key} try one of these characteristics: ${node.supported.join(
-                        ', '
-                    )}`
+                    `Instead of '${key}' try one of these characteristics: '${node.supported.join(
+                        "', '"
+                    )}'`
                 )
             } else {
                 const value = msg.payload?.[key]
diff --git a/src/lib/utils/ServiceUtils2.ts b/src/lib/utils/ServiceUtils2.ts
index 8828118b..877aed78 100644
--- a/src/lib/utils/ServiceUtils2.ts
+++ b/src/lib/utils/ServiceUtils2.ts
@@ -293,9 +293,9 @@ module.exports = function (node: HAPService2NodeType) {
                     }
                 } else {
                     log.error(
-                        `Instead of ${key} try one of these characteristics: ${node.supported.join(
-                            ', '
-                        )}`
+                        `Instead of '${key}' try one of these characteristics: '${node.supported.join(
+                            "', '"
+                        )}'`
                     )
                 }
             } else {
diff --git a/yarn.lock b/yarn.lock
index c22c32a5..3aa7db22 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -424,10 +424,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/node-red@^1.1.1":
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/@types/node-red/-/node-red-1.1.1.tgz#6e67edd2b4e88f01fcc57bc8e653c6f5e2f9e1f8"
-  integrity sha512-ePusasml1Wc7v/LWCD+804b3ROX8rlztxDDGu3fS4eq8cVNg8vsKwmioRvsFwYv6DVfEd9CAOh5Bn4n1qsocjQ==
+"@types/node-red@^1.2.0":
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@types/node-red/-/node-red-1.2.0.tgz#8483b53e0aeda86462fc0f1a991d2e972927bc6b"
+  integrity sha512-+nXKS75ZEmtnSOZ0fQP7zt8vSf2RVqQ/UBFhBHLwPQRv0uQeVS/Fzj6IaQ2YLFoPQAZ7lVQ+ki3ajINNpNlpSg==
   dependencies:
     "@types/express" "*"
     "@types/node-red__editor-api" "*"
@@ -455,18 +455,18 @@
     "@types/node-red__util" "*"
 
 "@types/node-red__registry@*":
-  version "1.1.5"
-  resolved "https://registry.yarnpkg.com/@types/node-red__registry/-/node-red__registry-1.1.5.tgz#6576a81584b405970d6c08e03878091b4b849af6"
-  integrity sha512-SSc9IdE2ESoAugenLvmxPgTrekWozOXGZZGvPcApaql91c3k4CZG9oYLSBWE0BvMjW1uQcaDOEUiDR5JVlRxUg==
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@types/node-red__registry/-/node-red__registry-1.2.0.tgz#18e16dbb6262c31e3cae6bcab931ef58497247d2"
+  integrity sha512-0YbBTdD06sU24BXapLXzC2I7lY+GU4uVNOiFXciP5RvlbVg2szJBfUfXN5M8/dC1wa1erayDjpetRUTHn8FzJg==
   dependencies:
     "@types/express" "*"
     "@types/node-red__runtime" "*"
     "@types/node-red__util" "*"
 
 "@types/node-red__runtime@*":
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/@types/node-red__runtime/-/node-red__runtime-1.1.3.tgz#e8780b1d632bea917626bd25c146ac032565b7bb"
-  integrity sha512-LOx+7gcsm3nq+4KXqC3FycEBijQ9XAbM4dJkOyky8vvM3ROcuxLIiOfzVmogSACHObfwX0phADBlz/JTeA+l9A==
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@types/node-red__runtime/-/node-red__runtime-1.2.0.tgz#723ecdc67e0818227b192d2f3bf1f47da0cd1e7f"
+  integrity sha512-1jSmhrzsBiW6OaNpyAdXitq0H3Zt2LYFNBhsLQE0LHSp77F26/bni1mFNGnIuo684CT+CX71kP6ZjuMJyeM/bA==
   dependencies:
     "@types/cors" "*"
     "@types/express" "*"
@@ -475,9 +475,9 @@
     "@types/passport" "*"
 
 "@types/node-red__util@*":
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/@types/node-red__util/-/node-red__util-1.1.2.tgz#586f5a71f0ce3fe136b0d39a8e2ca964a09aefce"
-  integrity sha512-XQsLKNdohotO4qUQtcMYen/c6hGSldrr48QuQy5oUnNdPpVtiT6GBFKcIuxXhTPiobmJkvwm9qgC6EwY+reIvw==
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/@types/node-red__util/-/node-red__util-1.2.0.tgz#97d29cc39839a48d452dacdd4b3d29c4def48e0e"
+  integrity sha512-jxxznqRl2UhmMimkv7+vvxcsi0fXS1EnTmiuQ2FwplTNvl2Ui+g4K2vbG/Jn/rsLujpM6oyPPjwzKPG1diPqUQ==
   dependencies:
     "@types/node-red__registry" "*"
     "@types/node-red__runtime" "*"