diff --git a/src/schema/core.yaml b/src/schema/core.yaml
index f7e0f8f706..4c8c3860aa 100644
--- a/src/schema/core.yaml
+++ b/src/schema/core.yaml
@@ -1016,10 +1016,7 @@ classes:
           tooltip: Provide the GOLD biosample IDs associated with this biosample.
 
       alternative_identifiers:
-        description: >-
-          A uriorcurie reference to an external database or resource that provides additional information or 
-          context about a specific entity at NMDC.
-        multivalued: true
+        description: Unique identifier for a biosample submitted to additional resources. Matches the entity that has been submitted to NMDC
 
       lat_lon:
         notes: