diff --git a/internal/proxy/util.go b/internal/proxy/util.go
index 6376b07b8f..101128c462 100644
--- a/internal/proxy/util.go
+++ b/internal/proxy/util.go
@@ -655,13 +655,9 @@ func ValidateFieldsInStruct(field *schemapb.FieldSchema, schema *schemapb.Collec
 		return fmt.Errorf("Nested array is not supported %s", field.Name)
 	}
 
-	if field.ElementType == schemapb.DataType_JSON {
-		return fmt.Errorf("JSON is not supported for fields in struct, fieldName = %s", field.Name)
-	}
-
 	if field.DataType == schemapb.DataType_Array {
-		if typeutil.IsVectorType(field.GetElementType()) {
-			return fmt.Errorf("Inconsistent schema: element type of array field %s is a vector type", field.Name)
+		if err := validateElementType(field.GetElementType()); err != nil {
+			return err
 		}
 	} else {
 		// TODO(SpadeA): only support float vector now
diff --git a/internal/proxy/util_test.go b/internal/proxy/util_test.go
index 1b2eb3760f..f95e7b11c3 100644
--- a/internal/proxy/util_test.go
+++ b/internal/proxy/util_test.go
@@ -3914,7 +3914,7 @@ func TestValidateFieldsInStruct(t *testing.T) {
 		}
 		err := ValidateFieldsInStruct(field, schema)
 		assert.Error(t, err)
-		assert.Contains(t, err.Error(), "JSON is not supported for fields in struct")
+		assert.Contains(t, err.Error(), "is not supported")
 	})
 
 	t.Run("nested array not supported", func(t *testing.T) {
@@ -3946,7 +3946,7 @@ func TestValidateFieldsInStruct(t *testing.T) {
 		}
 		err := ValidateFieldsInStruct(field, schema)
 		assert.Error(t, err)
-		assert.Contains(t, err.Error(), "element type of array field array_with_vector is a vector type")
+		assert.Contains(t, err.Error(), "element type FloatVector is not supported")
 	})
 
 	t.Run("array of vector field with non-vector element type", func(t *testing.T) {
@@ -4060,7 +4060,6 @@ func TestValidateFieldsInStruct(t *testing.T) {
 			schemapb.DataType_Int64,
 			schemapb.DataType_Float,
 			schemapb.DataType_Double,
-			schemapb.DataType_String,
 		}
 
 		for _, dt := range validScalarTypes {