diff --git a/openapi/v1/odmApi.yaml b/openapi/v1/odmApi.yaml
index 6b3647f4..ce4b12ba 100644
--- a/openapi/v1/odmApi.yaml
+++ b/openapi/v1/odmApi.yaml
@@ -18026,6 +18026,9 @@ paths:
     post:
       operationId: "create"
       requestBody:
+        description: "Request body for creating a new xrefset.\n## Important:\nThe\
+          \ length of 'sourceId' strings is limited to 255 characters. Ensure that\
+          \ the provided values adhere to this limitation to avoid data truncation.\n"
         content:
           application/json:
             schema:
@@ -18073,7 +18076,9 @@ paths:
         targetId\" and \"sourceId\". If non-empty lists of values for \"targetId\"\
         \ and \"sourceId\" are supplied, the following search rule is applied: (sourceId\
         \ = \"S1\" OR .. sourceId = \"Sn\") AND (targetId = \"T1\" OR .. targetId\
-        \ = \"Tm\").\n\n"
+        \ = \"Tm\").\n## Important:\nThe length of 'sourceId' strings is limited to\
+        \ 255 characters. Ensure that the provided values adhere to this limitation\
+        \ to avoid data truncation.\n"
       operationId: "searchEntries"
       parameters:
       - description: "Supply sourceId in the format \"sourceId\". For transcript-gene\
diff --git a/openapi/v1/referenceData.yaml b/openapi/v1/referenceData.yaml
index e2bea1c2..a2873b57 100644
--- a/openapi/v1/referenceData.yaml
+++ b/openapi/v1/referenceData.yaml
@@ -11,6 +11,10 @@ paths:
     post:
       operationId: create
       requestBody:
+        description: |+
+          Request body for creating a new xrefset.
+          ## Important:
+          The length of 'sourceId' strings is limited to 255 characters. Ensure that the provided values adhere to this limitation to avoid data truncation.
         content:
           application/json:
             schema:
@@ -56,7 +60,8 @@ paths:
       description: |+
         ## Conditions
         It is possible to supply a list of values for "targetId" and "sourceId". If non-empty lists of values for "targetId" and "sourceId" are supplied, the following search rule is applied: (sourceId = "S1" OR .. sourceId = "Sn") AND (targetId = "T1" OR .. targetId = "Tm").
-
+        ## Important:
+        The length of 'sourceId' strings is limited to 255 characters. Ensure that the provided values adhere to this limitation to avoid data truncation.
       operationId: searchEntries
       parameters:
       - description: "Supply sourceId in the format \"sourceId\". For transcript-gene\