diff --git a/docs/errors.mdx b/docs/errors.mdx
index 7319912..eaee8a9 100644
--- a/docs/errors.mdx
+++ b/docs/errors.mdx
@@ -29,6 +29,7 @@ import { DiscordInlineCode } from '@skyra/discord-components-react';
 | 17   | SUGGESTION_RESOLUTION_ERROR                      | [click](#suggestion-resolution-error)                     |
 | 18   | MISSING_SEND_PERMISSIONS_IN_SUGGESTION_CHANNEL   | [click](#missing-send-permissions-in-suggestions-channel) |
 | 19   | MISSING_THREAD_CREATE_PERMISSIONS                | [click](#missing-thread-create-permissions)               |
+| 20   | QUEUE_IMBALANCE                                  | [click](#queue-imbalance)                                 |
 
 ## Error Information
 
@@ -225,4 +226,18 @@ This error is thrown when the bot cannot create threads in your suggestions chan
         Alternatively, ask your administrator to disable automatic thread creation using <DiscordInlineCode>/config thread disable</DiscordInlineCode>
       </>
     }
-    code={19} />
\ No newline at end of file
+    code={19} />
+
+### Queue Imbalance
+
+This error is thrown when you attempt to use a suggestion in a queue which has already been used
+in a separate queue.
+
+<ErrorEmbed
+    title="Queue Imbalance"
+    description={
+      <>
+          This suggestion has already been handled in another queue.
+      </>
+    }
+    code={20} />
\ No newline at end of file
diff --git a/src/constants.ts b/src/constants.ts
index f41bf0a..9130320 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -26,7 +26,8 @@ export enum ErrorCode {
   MISSING_TRANSLATION = 16,
   SUGGESTION_RESOLUTION_ERROR = 17,
   MISSING_SEND_PERMISSIONS_IN_SUGGESTION_CHANNEL = 18,
-  MISSING_THREAD_CREATE_PERMISSIONS = 19
+  MISSING_THREAD_CREATE_PERMISSIONS = 19,
+  QUEUE_IMBALANCE = 20
 }
 
 export type EmbedProps = {