diff --git a/data/api/identity/v2_email_associations.yaml b/data/api/identity/v2_email_associations.yaml
index e37c9725..2f643f31 100644
--- a/data/api/identity/v2_email_associations.yaml
+++ b/data/api/identity/v2_email_associations.yaml
@@ -154,14 +154,13 @@ paths:
                     "success": true
                   }
         "400":
-          x-addedInMatrixVersion: "1.18"
           description: |
             An error occurred. Some possible errors are:
 
-            - `M_TOKEN_INCORRECT`: The token that the user entered to validate the session is
+            - **[Added in v1.18]** `M_TOKEN_INCORRECT`: The token that the user entered to validate the session is
               incorrect.
-            - `M_INVALID_PARAM`: One of the supplied parameters is not valid.
-            - `M_SESSION_EXPIRED`: The validation session in question has expired.
+            - **[Added in v1.18]** `M_INVALID_PARAM`: One of the supplied parameters is not valid.
+            - **[Added in v1.18]** `M_SESSION_EXPIRED`: The validation session in question has expired.
           content:
             application/json:
               schema:
diff --git a/data/api/identity/v2_phone_associations.yaml b/data/api/identity/v2_phone_associations.yaml
index 047cbc40..eb3fd344 100644
--- a/data/api/identity/v2_phone_associations.yaml
+++ b/data/api/identity/v2_phone_associations.yaml
@@ -156,14 +156,13 @@ paths:
                     "success": true
                   }
         "400":
-          x-addedInMatrixVersion: "1.18"
           description: |
             An error occurred. Some possible errors are:
 
-            - `M_TOKEN_INCORRECT`: The token that the user entered to validate the session is
+            - **[Added in v1.18]** `M_TOKEN_INCORRECT`: The token that the user entered to validate the session is
               incorrect.
-            - `M_INVALID_PARAM`: One of the supplied parameters is not valid.
-            - `M_SESSION_EXPIRED`: The validation session in question has expired.
+            - **[Added in v1.18]** `M_INVALID_PARAM`: One of the supplied parameters is not valid.
+            - **[Added in v1.18]** `M_SESSION_EXPIRED`: The validation session in question has expired.
           content:
             application/json:
               schema: